4m Inflatable Catamaran Australia – Viper 400 Sports Package
The ultra-stable 4m inflatable catamaran for family adventures, fishing, and confident coastal cruising. Built for buyers who want maximum stability, a rigid underfoot feel, and a package-ready setup designed for real Australian conditions.
⭐ 4.9/5 Rated by Australian Boaties 🛡 5-Year Structural Warranty 🚚 Free DDP AU Delivery + Optional DHL Express 5–7 Days 🔒 Secure SSL Checkout 📞 Australian Phone Support
Package-Ready Ownership Value
What’s included in the Viper 400 package
This package is built to feel like a complete ownership solution, not a stripped-back platform that forces you to keep spending afterwards.
🌊
Premium Catamaran Hull Platform
Twin-hull stability for a more confidence-inspiring ride and reduced roll at rest.
🛡
1.2mm 2000D Valmex® PVC
Commercial-grade fabric built for abrasion resistance, UV exposure, and long-term ownership confidence.
🦶
12 PSI Drop-Stitch Air Floor
A firmer, more rigid underfoot feel with no heavy panel assembly required.
🌡
Over-Inflation Safety Valves
A premium safety feature that helps protect the tubes when heat causes air pressure to rise in harsh Australian conditions.
☀️
Full Grey Bimini
Shade and comfort already sorted for longer days on the water.
🛞
LockPro Plus Wheel System
Factory-installed wheels help make beach and ramp launching easier and more practical.
⚡
22 PSI Lithium Battery Air Pump
Faster inflation with less manual effort on launch day.
🪑
2 x Aluminium Bench Seats
Flexible passenger and fishing layout options with storage practicality.
🧰
Oars, Manual Pump & Repair Kit
Core essentials included so you can get started properly.
🎒
Heavy-Duty Carry / Storage Bag
Storage and transport made simpler when the boat is not in use.
Why this matters for value
Fewer hidden costs later: more of the big-ticket gear is already accounted for
Less time piecing together extras: easier ownership from day one
Stronger package value: you are not comparing a bare boat to an equipped ownership-ready package
Better hot-weather peace of mind: over-inflation safety valves add another layer of confidence in Australian summer conditions
FREE DDP SHIPPING AUSTRALIA-WIDE
🚚 Delivered Australia-Wide With No Hidden Import or GST Costs
Every Viper 400 package includes FREE DDP (Delivered Duty Paid) Australia-wide delivery. That means duties, taxes, import handling and clearance are included, with no surprise import costs on arrival.
Need it faster? We also offer an optional DHL Express delivery service with typical delivery times of around 5–7 days. DHL Express is a paid premium upgrade available separately.
Outside Australia? We can also assist with international freight quotations for buyers who want the Viper 400 delivered overseas. Please contact us for a tailored freight quote based on your destination and package configuration.
📦 FREE DDP Delivery
All duties, taxes and clearance handled, with delivery included Australia-wide.
✈️ Optional DHL Express
Faster 5–7 day delivery upgrade available as a paid premium shipping option.
🌍 International Freight
Worldwide delivery can be arranged by quotation for overseas buyers.
🧭 Fully Managed Logistics
We coordinate the shipping process from factory dispatch through to final delivery.
⚠️ Current shipment allocations are being quoted at existing international freight rates where available
🔒 Price Locked Once Secured
Once your order is confirmed and deposit received, your total price is locked — even if global freight costs increase after that point.
Some models are built or sourced to order. While DDP delivery is included Australia-wide, global freight markets and optional express services such as DHL can fluctuate prior to order confirmation. If any significant cost change occurs before your order is secured, we will notify you for approval before proceeding.
The Viper 400 Sports Package is designed for owners who want a 4m inflatable platform that feels stable at rest, predictable underway, and confidence-inspiring when family, mates, or fishing gear move around on board. The twin-hull catamaran layout reduces roll, while the 12 PSI drop-stitch floor gives a firmer, more planted, boat-like feel under load. Added over-inflation safety valves also help protect tube pressure in hot Australian conditions.
⚓ Less Roll At Rest
More confidence when boarding, fishing, or when kids and passengers move around.
🦶 Rigid Feel Underfoot
The 12 PSI drop-stitch floor feels firmer and more secure than softer inflatable floor styles.
🚀 Faster Setup
No heavy floor panels to assemble. Easier launch days and less hassle at the ramp or beach.
💰 Better Value Ownership
Major accessories are already included, helping reduce extra spending after purchase.
🌊 Drier, More Comfortable Ride
The catamaran hull layout helps reduce spray and improves comfort in choppy conditions.
🛠 Commercial-Grade Materials
Built with 1.2mm German Mehler Valmex® fabric and thermo-welded seams for tougher long-term ownership.
🌡 Pressure Protection
Over-inflation safety valves help protect the tubes from excess pressure buildup in hot weather.
What you’re really buying
More family confidence from a platform that feels stable and predictable
Less setup frustration before a day on the water
Fewer surprise extras thanks to the package-ready specification
Longer-term peace of mind from tougher materials, pressure-protection features, and Australian support
Best for
Families wanting maximum stability in a 4m inflatable
Fishing and day trips with less roll at rest
Beach launching with wheels already included
Buyers wanting a heavier-duty ownership spec, not a stripped-back inflatable
⚠ 0 Available Now for Immediate Dispatch
Immediate dispatch model SOLD – 16/03/2026. Stay tuned for another immediate dispatch model available around 31st March 2026 or have one built right now.
Only 2 build slots remain in the current production cycle. Once those allocations are secured, the next orders move into the following month’s run.
Delivery options:FREE DDP Australia-wide delivery is included. Optional DHL Express is normally 5–7 days and available at additional cost. International freight is also available by quotation.
Current production allocation
3 of 5 build slots allocated • 2 slots remaining
Next production cycle opens once the remaining slots are secured.
4.9/5 average rating • 20 Google reviews • 300+ boats delivered nationwide
🛡 5 Year Structural Warranty
Covers structural seams and core tube construction under normal recreational use, backed by Australian support.
🌡 Built for Hot Conditions
Over-inflation safety valves add another layer of ownership confidence for Australian heat, helping manage pressure buildup on hot days.
🚚 Flexible Delivery Options
FREE DDP Australia-wide delivery is included with no hidden import costs. Optional DHL Express delivery is also available with typical delivery of around 5–7 days at additional cost. International freight is available by quotation.
📞 Why Buy From Easy Inflatables?
Australian inflatable boat specialists
Commercial skipper experience
Setup advice and outboard guidance
Australian support and spare parts help
Premium builds selected for real conditions
Premium VIPER 400 build detail
Factory Built Confidence
The Viper 400 is built using premium marine materials, precision tube construction, and factory-controlled assembly standards designed for long-term ownership confidence. This section shows the sort of real build detail that separates the Viper 400 inflatable catamaran from cheaper look-alike alternatives. Over-inflation safety valves are also part of the stronger-spec ownership detail many cheaper brands leave out.
Early-stage hull build
Showing the boat at a more raw build stage helps you see genuine factory construction detail before the premium finishing work is completed. The upside down grill on the transom is part of the build.
Precision construction
Reinforced seams and transom work, careful tube assembly, and clean finishing standards help deliver the stronger premium look and feel buyers expect from the Viper 400.
Finished premium result
This is the type of clean, premium final finish that gives buyers more confidence they are stepping up to a serious inflatable catamaran built for real use. This catamaran has some seriously good specifications and you wont find a better custom built 4 metre catamaran on the market.
LockPro launch-ready setup
The fitted LockPro wheel set shows the sort of practical premium detail buyers appreciate — easier beach handling, easier boat ramp launching, and a more complete ownership-ready setup from day one. Grey wheels also available. Check the wheels out here!
Why this matters for you as the buyer
More confidence in what you are paying for because the build quality is visible, not just claimed
Stronger premium positioning compared with lighter-duty inflatables that look generic online
Better long-term ownership confidence when construction standards and materials are taken seriously
More trust before purchase because buyers can see real manufacturing and finished-product quality
Better protection in Australian heat with over-inflation safety valves included as part of the build spec
Flexible ordering options
50% deposit option
New boat builds can be secured with a 50% deposit at the time of order, helping you lock your build slot without paying the full amount upfront.
Clear custom build process
Deposits accepted by EFT, credit card, or debit card. Remaining balance is payable prior to dispatch. Estimated turnaround for custom builds is approximately 4–5 weeks.
Why the fabric really matters
Commercial-grade German Mehler Valmex® fabric chosen for stronger abrasion confidence, UV resistance, and long-term ownership value.
A premium 4m inflatable should not just look good in product photos. It should also give you confidence when you are storing it in Australian sun, loading family or gear, launching off the beach, or using it regularly in saltwater.
Commercial-grade material, explained simply
1.2mm Mehler Valmex® PVC delivers stronger puncture and abrasion confidence
Thermo-welded seams reduce reliance on glue in key construction areas
Better UV and saltwater confidence matters in real Australian conditions
Higher-quality materials support longer-term ownership, not just first impressions
Over-inflation safety valves help protect the tubes when pressure rises in hot weather
See the Viper 400 in action
Watch the Viper 400 package presentation to help you understand the boat, stability, and premium included setup.
See how the Viper 400 folds and packs away, giving you a better feel for practical ownership, storage and transport.
What buyers should notice
Stable catamaran stance
Premium package presentation
Ready-to-launch ownership feel
More confidence for family and fishing use
Higher-spec safety details like over-inflation valve protection
Buyer comparison: Discovery-style 4m cats vs Viper 400 Package
Important Comparison note: Specifications, inclusions, layouts, materials and pricing can vary significantly by model year, supplier, region and individual seller package. This comparison is provided as a general buyer guide only and may not reflect every configuration available on the market.
We do not represent or verify competitor listings. Buyers should independently confirm specifications, inclusions and pricing directly with the relevant seller before making a purchase decision. This comparison is intended to assist with general understanding only and should not be relied upon as the sole basis for purchase.
This is a buyer-focused ownership comparison guide only. Always verify the exact listing you are comparing.
Feature
Viper 400 Sports Package
Typical Discovery-Style 4m Cat
Package value
Many key accessories included
Can vary by seller / package
Tube fabric
1.2mm 2000D Mehler Valmex® PVC
Often lighter-weight spec 0.9mm, 1100 decitex Valmex® PVC
Floor rigidity
12 PSI drop-stitch floor
Varies by listing (normally 8-10 PSI Max)
Pressure protection
Over-inflation safety valves included
Not always included
Ownership support
Australian support + setup guidance
Varies by seller, normally overseas
Bottom line
Premium stability + package-ready value
May suit lighter or different ownership priorities
Bottom line: If you want a 4m inflatable catamaran with stronger underfoot feel, heavier-duty materials, over-inflation valve protection, and a package that includes the accessories most owners buy anyway, the Viper 400 Sports Package is the stronger total-package choice.
We spent months comparing inflatable cats and ended up going with the Viper 400. The stability is the first thing you notice — even with two adults moving around it barely rolls. The build quality also feels a step above most inflatables we’ve owned.
— Mark Thompson
⭐⭐⭐⭐⭐ Perfect size for family days
The Viper 400 has been a great upgrade from our previous inflatable. It feels very stable when people move around which makes a big difference with kids onboard. The finish and materials are impressive.
— Jason Reid
⭐⭐⭐⭐⭐ Handles chop better than expected
I bought the Viper 400 mainly for fishing and it’s been excellent. The cat hull gives it great stability at rest and it tracks nicely when the wind comes up. Plenty of space for two anglers as well.
— Paul Henderson
⭐⭐⭐⭐⭐ Build quality is excellent
You can tell the materials are high quality straight away. The fabric feels thick and the seams look very well finished. It feels more like a serious small boat than a typical inflatable.
— Daniel Harper
⭐⭐⭐⭐⭐ Great all-round catamaran inflatable
We use the Viper 400 for weekend boating and fishing. Stability is excellent and it feels very safe with the family onboard. Easy Inflatables were also great to deal with.
— Chris Bennett
Frequently asked questions
Stability & confidence
What makes the Viper 400 different from a standard inflatable boat?
Its twin-hull catamaran design is focused on stability at rest, while the 12 PSI floor gives a firmer, more rigid underfoot feel. The result is a platform that feels more confidence-inspiring for family boating and fishing.
Engine matching
What kind of outboard can I run?
The Viper 400 is rated from 6–20HP, with a maximum 20HP rating. The right horsepower depends on your load, use case, and performance goals. We help buyers choose the most suitable setup for the way they will actually use the boat.
Family & fishing use
Is it suitable for family boating and fishing?
Yes. This is one of the main reasons buyers choose it. Reduced roll at rest, a firmer floor, and a wider-feeling catamaran layout make it attractive for families and anglers alike.
Safety feature
Why do over-inflation safety valves matter?
They help protect the tubes from excessive pressure buildup in hot Australian conditions. That is a valuable ownership feature because pressure can rise when boats are left in the sun or stored inflated during warmer weather.
Ownership value
Why is the package value important?
Because many buyers underestimate the total spend required after purchasing a bare boat. This package helps reduce that by including the major accessories most owners want anyway, making ownership feel more complete from day one.
Support after sale
Do you offer support after purchase?
Yes. Easy Inflatables provides Australian support for product questions, setup guidance, ownership advice, and general inflatable boat help, so buyers are not left on their own after delivery.
Build timing
How does the custom build process work?
Custom builds are secured with a 50% deposit. Once your slot is locked, the remaining balance is payable prior to dispatch. Estimated turnaround is usually around 4–5 weeks depending on production allocation and timing.
Delivery included
What shipping is included with the Viper 400 package?
Every order includes FREE DDP (Delivered Duty Paid) Australia-wide delivery. That means duties, taxes, import handling and clearance are included, with no surprise import costs on arrival. We manage the shipping process from factory dispatch through to final delivery.
Optional upgrade
Can I upgrade to DHL Express delivery?
Yes. Buyers who want a faster turnaround can choose an optional DHL Express delivery upgrade, which is normally around 5–7 days and charged separately as a premium service.
International freight
Can you ship the Viper 400 outside Australia?
Yes. We can arrange international freight by quotation. Because destinations, taxes, import rules and final freight costs vary, please contact us for a tailored overseas delivery quote.
Price protection
Will my price change after I place my order?
Once your order is confirmed and deposit received, your total price is locked in. If any significant freight change happens before your order is secured, including optional DHL carrier changes, fuel surcharges or major logistics disruptions, we will contact you for approval before proceeding.
Important — custom build, delivery & payment information
50% deposit required at the time of order for custom builds
Deposits accepted via EFT, credit card, or debit card
Remaining balance payable prior to dispatch
Estimated turnaround for custom builds: approximately 4–5 weeks
FREE DDP Australia-wide delivery included with no hidden import costs
Optional DHL Express delivery is normally around 5–7 days and available at additional cost
International freight available by quotation for overseas buyers
🚚 Free DDP Australia-wide delivery included • Optional DHL Express normally 5–7 days at additional cost • 🌍 International freight available by quotation
Ready to secure your Viper 400?
If you want a premium 4m inflatable catamaran with serious stability, strong package value, over-inflation valve protection, and Australian support, the Viper 400 Sports Package is built for that outcome.
4m Inflatable Catamaran Australia – Viper 400 Sports Package
The ultra-stable 4m inflatable catamaran for family adventures, fishing, and confident coastal cruising. Built for buyers who want maximum stability, a rigid underfoot feel, and a package-ready setup designed for real Australian conditions.
⭐ 4.9/5 Rated by Australian Boaties 🛡 5-Year Structural Warranty 🚚 Free DDP AU Delivery + Optional DHL Express 5–7 Days 🔒 Secure SSL Checkout 📞 Australian Phone Support
Package-Ready Ownership Value
What’s included in the Viper 400 package
This package is built to feel like a complete ownership solution, not a stripped-back platform that forces you to keep spending afterwards.
🌊
Premium Catamaran Hull Platform
Twin-hull stability for a more confidence-inspiring ride and reduced roll at rest.
🛡
1.2mm 2000D Valmex® PVC
Commercial-grade fabric built for abrasion resistance, UV exposure, and long-term ownership confidence.
🦶
12 PSI Drop-Stitch Air Floor
A firmer, more rigid underfoot feel with no heavy panel assembly required.
🌡
Over-Inflation Safety Valves
A premium safety feature that helps protect the tubes when heat causes air pressure to rise in harsh Australian conditions.
☀️
Full Grey Bimini
Shade and comfort already sorted for longer days on the water.
🛞
LockPro Plus Wheel System
Factory-installed wheels help make beach and ramp launching easier and more practical.
⚡
22 PSI Lithium Battery Air Pump
Faster inflation with less manual effort on launch day.
🪑
2 x Aluminium Bench Seats
Flexible passenger and fishing layout options with storage practicality.
🧰
Oars, Manual Pump & Repair Kit
Core essentials included so you can get started properly.
🎒
Heavy-Duty Carry / Storage Bag
Storage and transport made simpler when the boat is not in use.
Why this matters for value
Fewer hidden costs later: more of the big-ticket gear is already accounted for
Less time piecing together extras: easier ownership from day one
Stronger package value: you are not comparing a bare boat to an equipped ownership-ready package
Better hot-weather peace of mind: over-inflation safety valves add another layer of confidence in Australian summer conditions
FREE DDP SHIPPING AUSTRALIA-WIDE
🚚 Delivered Australia-Wide With No Hidden Import or GST Costs
Every Viper 400 package includes FREE DDP (Delivered Duty Paid) Australia-wide delivery. That means duties, taxes, import handling and clearance are included, with no surprise import costs on arrival.
Need it faster? We also offer an optional DHL Express delivery service with typical delivery times of around 5–7 days. DHL Express is a paid premium upgrade available separately.
Outside Australia? We can also assist with international freight quotations for buyers who want the Viper 400 delivered overseas. Please contact us for a tailored freight quote based on your destination and package configuration.
📦 FREE DDP Delivery
All duties, taxes and clearance handled, with delivery included Australia-wide.
✈️ Optional DHL Express
Faster 5–7 day delivery upgrade available as a paid premium shipping option.
🌍 International Freight
Worldwide delivery can be arranged by quotation for overseas buyers.
🧭 Fully Managed Logistics
We coordinate the shipping process from factory dispatch through to final delivery.
⚠️ Current shipment allocations are being quoted at existing international freight rates where available
🔒 Price Locked Once Secured
Once your order is confirmed and deposit received, your total price is locked — even if global freight costs increase after that point.
Some models are built or sourced to order. While DDP delivery is included Australia-wide, global freight markets and optional express services such as DHL can fluctuate prior to order confirmation. If any significant cost change occurs before your order is secured, we will notify you for approval before proceeding.
The Viper 400 Sports Package is designed for owners who want a 4m inflatable platform that feels stable at rest, predictable underway, and confidence-inspiring when family, mates, or fishing gear move around on board. The twin-hull catamaran layout reduces roll, while the 12 PSI drop-stitch floor gives a firmer, more planted, boat-like feel under load. Added over-inflation safety valves also help protect tube pressure in hot Australian conditions.
⚓ Less Roll At Rest
More confidence when boarding, fishing, or when kids and passengers move around.
🦶 Rigid Feel Underfoot
The 12 PSI drop-stitch floor feels firmer and more secure than softer inflatable floor styles.
🚀 Faster Setup
No heavy floor panels to assemble. Easier launch days and less hassle at the ramp or beach.
💰 Better Value Ownership
Major accessories are already included, helping reduce extra spending after purchase.
🌊 Drier, More Comfortable Ride
The catamaran hull layout helps reduce spray and improves comfort in choppy conditions.
🛠 Commercial-Grade Materials
Built with 1.2mm German Mehler Valmex® fabric and thermo-welded seams for tougher long-term ownership.
🌡 Pressure Protection
Over-inflation safety valves help protect the tubes from excess pressure buildup in hot weather.
What you’re really buying
More family confidence from a platform that feels stable and predictable
Less setup frustration before a day on the water
Fewer surprise extras thanks to the package-ready specification
Longer-term peace of mind from tougher materials, pressure-protection features, and Australian support
Best for
Families wanting maximum stability in a 4m inflatable
Fishing and day trips with less roll at rest
Beach launching with wheels already included
Buyers wanting a heavier-duty ownership spec, not a stripped-back inflatable
⚠ 0 Available Now for Immediate Dispatch
Immediate dispatch model SOLD – 16/03/2026. Stay tuned for another immediate dispatch model available around 31st March 2026 or have one built right now.
Only 2 build slots remain in the current production cycle. Once those allocations are secured, the next orders move into the following month’s run.
Delivery options:FREE DDP Australia-wide delivery is included. Optional DHL Express is normally 5–7 days and available at additional cost. International freight is also available by quotation.
Current production allocation
3 of 5 build slots allocated • 2 slots remaining
Next production cycle opens once the remaining slots are secured.
4.9/5 average rating • 20 Google reviews • 300+ boats delivered nationwide
🛡 5 Year Structural Warranty
Covers structural seams and core tube construction under normal recreational use, backed by Australian support.
🌡 Built for Hot Conditions
Over-inflation safety valves add another layer of ownership confidence for Australian heat, helping manage pressure buildup on hot days.
🚚 Flexible Delivery Options
FREE DDP Australia-wide delivery is included with no hidden import costs. Optional DHL Express delivery is also available with typical delivery of around 5–7 days at additional cost. International freight is available by quotation.
📞 Why Buy From Easy Inflatables?
Australian inflatable boat specialists
Commercial skipper experience
Setup advice and outboard guidance
Australian support and spare parts help
Premium builds selected for real conditions
Premium VIPER 400 build detail
Factory Built Confidence
The Viper 400 is built using premium marine materials, precision tube construction, and factory-controlled assembly standards designed for long-term ownership confidence. This section shows the sort of real build detail that separates the Viper 400 inflatable catamaran from cheaper look-alike alternatives. Over-inflation safety valves are also part of the stronger-spec ownership detail many cheaper brands leave out.
Early-stage hull build
Showing the boat at a more raw build stage helps you see genuine factory construction detail before the premium finishing work is completed. The upside down grill on the transom is part of the build.
Precision construction
Reinforced seams and transom work, careful tube assembly, and clean finishing standards help deliver the stronger premium look and feel buyers expect from the Viper 400.
Finished premium result
This is the type of clean, premium final finish that gives buyers more confidence they are stepping up to a serious inflatable catamaran built for real use. This catamaran has some seriously good specifications and you wont find a better custom built 4 metre catamaran on the market.
LockPro launch-ready setup
The fitted LockPro wheel set shows the sort of practical premium detail buyers appreciate — easier beach handling, easier boat ramp launching, and a more complete ownership-ready setup from day one. Grey wheels also available. Check the wheels out here!
Why this matters for you as the buyer
More confidence in what you are paying for because the build quality is visible, not just claimed
Stronger premium positioning compared with lighter-duty inflatables that look generic online
Better long-term ownership confidence when construction standards and materials are taken seriously
More trust before purchase because buyers can see real manufacturing and finished-product quality
Better protection in Australian heat with over-inflation safety valves included as part of the build spec
Flexible ordering options
50% deposit option
New boat builds can be secured with a 50% deposit at the time of order, helping you lock your build slot without paying the full amount upfront.
Clear custom build process
Deposits accepted by EFT, credit card, or debit card. Remaining balance is payable prior to dispatch. Estimated turnaround for custom builds is approximately 4–5 weeks.
Why the fabric really matters
Commercial-grade German Mehler Valmex® fabric chosen for stronger abrasion confidence, UV resistance, and long-term ownership value.
A premium 4m inflatable should not just look good in product photos. It should also give you confidence when you are storing it in Australian sun, loading family or gear, launching off the beach, or using it regularly in saltwater.
Commercial-grade material, explained simply
1.2mm Mehler Valmex® PVC delivers stronger puncture and abrasion confidence
Thermo-welded seams reduce reliance on glue in key construction areas
Better UV and saltwater confidence matters in real Australian conditions
Higher-quality materials support longer-term ownership, not just first impressions
Over-inflation safety valves help protect the tubes when pressure rises in hot weather
See the Viper 400 in action
Watch the Viper 400 package presentation to help you understand the boat, stability, and premium included setup.
See how the Viper 400 folds and packs away, giving you a better feel for practical ownership, storage and transport.
What buyers should notice
Stable catamaran stance
Premium package presentation
Ready-to-launch ownership feel
More confidence for family and fishing use
Higher-spec safety details like over-inflation valve protection
Buyer comparison: Discovery-style 4m cats vs Viper 400 Package
Important Comparison note: Specifications, inclusions, layouts, materials and pricing can vary significantly by model year, supplier, region and individual seller package. This comparison is provided as a general buyer guide only and may not reflect every configuration available on the market.
We do not represent or verify competitor listings. Buyers should independently confirm specifications, inclusions and pricing directly with the relevant seller before making a purchase decision. This comparison is intended to assist with general understanding only and should not be relied upon as the sole basis for purchase.
This is a buyer-focused ownership comparison guide only. Always verify the exact listing you are comparing.
Feature
Viper 400 Sports Package
Typical Discovery-Style 4m Cat
Package value
Many key accessories included
Can vary by seller / package
Tube fabric
1.2mm 2000D Mehler Valmex® PVC
Often lighter-weight spec 0.9mm, 1100 decitex Valmex® PVC
Floor rigidity
12 PSI drop-stitch floor
Varies by listing (normally 8-10 PSI Max)
Pressure protection
Over-inflation safety valves included
Not always included
Ownership support
Australian support + setup guidance
Varies by seller, normally overseas
Bottom line
Premium stability + package-ready value
May suit lighter or different ownership priorities
Bottom line: If you want a 4m inflatable catamaran with stronger underfoot feel, heavier-duty materials, over-inflation valve protection, and a package that includes the accessories most owners buy anyway, the Viper 400 Sports Package is the stronger total-package choice.
We spent months comparing inflatable cats and ended up going with the Viper 400. The stability is the first thing you notice — even with two adults moving around it barely rolls. The build quality also feels a step above most inflatables we’ve owned.
— Mark Thompson
⭐⭐⭐⭐⭐ Perfect size for family days
The Viper 400 has been a great upgrade from our previous inflatable. It feels very stable when people move around which makes a big difference with kids onboard. The finish and materials are impressive.
— Jason Reid
⭐⭐⭐⭐⭐ Handles chop better than expected
I bought the Viper 400 mainly for fishing and it’s been excellent. The cat hull gives it great stability at rest and it tracks nicely when the wind comes up. Plenty of space for two anglers as well.
— Paul Henderson
⭐⭐⭐⭐⭐ Build quality is excellent
You can tell the materials are high quality straight away. The fabric feels thick and the seams look very well finished. It feels more like a serious small boat than a typical inflatable.
— Daniel Harper
⭐⭐⭐⭐⭐ Great all-round catamaran inflatable
We use the Viper 400 for weekend boating and fishing. Stability is excellent and it feels very safe with the family onboard. Easy Inflatables were also great to deal with.
— Chris Bennett
Frequently asked questions
Stability & confidence
What makes the Viper 400 different from a standard inflatable boat?
Its twin-hull catamaran design is focused on stability at rest, while the 12 PSI floor gives a firmer, more rigid underfoot feel. The result is a platform that feels more confidence-inspiring for family boating and fishing.
Engine matching
What kind of outboard can I run?
The Viper 400 is rated from 6–20HP, with a maximum 20HP rating. The right horsepower depends on your load, use case, and performance goals. We help buyers choose the most suitable setup for the way they will actually use the boat.
Family & fishing use
Is it suitable for family boating and fishing?
Yes. This is one of the main reasons buyers choose it. Reduced roll at rest, a firmer floor, and a wider-feeling catamaran layout make it attractive for families and anglers alike.
Safety feature
Why do over-inflation safety valves matter?
They help protect the tubes from excessive pressure buildup in hot Australian conditions. That is a valuable ownership feature because pressure can rise when boats are left in the sun or stored inflated during warmer weather.
Ownership value
Why is the package value important?
Because many buyers underestimate the total spend required after purchasing a bare boat. This package helps reduce that by including the major accessories most owners want anyway, making ownership feel more complete from day one.
Support after sale
Do you offer support after purchase?
Yes. Easy Inflatables provides Australian support for product questions, setup guidance, ownership advice, and general inflatable boat help, so buyers are not left on their own after delivery.
Build timing
How does the custom build process work?
Custom builds are secured with a 50% deposit. Once your slot is locked, the remaining balance is payable prior to dispatch. Estimated turnaround is usually around 4–5 weeks depending on production allocation and timing.
Delivery included
What shipping is included with the Viper 400 package?
Every order includes FREE DDP (Delivered Duty Paid) Australia-wide delivery. That means duties, taxes, import handling and clearance are included, with no surprise import costs on arrival. We manage the shipping process from factory dispatch through to final delivery.
Optional upgrade
Can I upgrade to DHL Express delivery?
Yes. Buyers who want a faster turnaround can choose an optional DHL Express delivery upgrade, which is normally around 5–7 days and charged separately as a premium service.
International freight
Can you ship the Viper 400 outside Australia?
Yes. We can arrange international freight by quotation. Because destinations, taxes, import rules and final freight costs vary, please contact us for a tailored overseas delivery quote.
Price protection
Will my price change after I place my order?
Once your order is confirmed and deposit received, your total price is locked in. If any significant freight change happens before your order is secured, including optional DHL carrier changes, fuel surcharges or major logistics disruptions, we will contact you for approval before proceeding.
Important — custom build, delivery & payment information
50% deposit required at the time of order for custom builds
Deposits accepted via EFT, credit card, or debit card
Remaining balance payable prior to dispatch
Estimated turnaround for custom builds: approximately 4–5 weeks
FREE DDP Australia-wide delivery included with no hidden import costs
Optional DHL Express delivery is normally around 5–7 days and available at additional cost
International freight available by quotation for overseas buyers
🚚 Free DDP Australia-wide delivery included • Optional DHL Express normally 5–7 days at additional cost • 🌍 International freight available by quotation
Ready to secure your Viper 400?
If you want a premium 4m inflatable catamaran with serious stability, strong package value, over-inflation valve protection, and Australian support, the Viper 400 Sports Package is built for that outcome.
This product has multiple variants. The options may be chosen on the product page
At Easy Inflatables, we believe in empowering adventurers with high-quality inflatable solutions. Our commitment to durability and performance ensures that every product enhances your outdoor experiences.
