Strenfit X500 High-Pressure Drop Stitch Inflatable 1-Seat Kayak

Réf :
Product plus point
A rigid kayak that fits in a backpack? How? We invented it! High-performing, lightweight, rigid and easy to inflate, the Strenfit Kayak takes you where you want to go year-round!
Users reviews
3.92 / 5 114 ratings

User benefits

2 cleverly placed cargo areas to transport up to 125 kg, you included :)
Easy assembly / dismantling
Inflates in 3 minutes to 10 PSI (0.7 bar) using a double-action hand pump.
Glide performance
Incredible sensations! V-shaped hull reduces friction on the water.
Sitting comfort
Very dense foam seat is perfect for all day excursions.
Anatomic design
Adjust the foot rests to your size in the cockpit area whenever you want.
The coaming lets you use your spray deck so that you can paddle in all seasons
Reinforcements in the areas exposed to friction, leaving you free to paddle.
Quick drying
Watertight kayak. Use a towel to dry it.

Technical card

Main fabric : 95.0% Polyéthylène (PE), Main fabric : 5.0% Polyester (PES)
Approved by
Standard ISO 6185-1: corresponds to the international inflatable kayak standard.
"Our kayak is tested and approved by our internal and external ambassadors. Some examples? Nicolas travelled the Dordogne with this kayak: 131 KM in 1 day François travelled the length of the Danube from Ulm in Germany to Sulina, Romania on the Black Sea: 2 600 km! Find their stories and our videos on our site dedicated to all things kayak: Check out our itiwit website.
Designed for
Intermediate kayakers touring for the day on lakes, calm rivers or in calm seas. Approved for sea touring beyond 300 m.
2 years
Download user manual link


Storage advice
Dry, deflate, fold up. Store your kayak in its bag in a cool, dry place.
Use restriction
Designed for one person up to 1 meter 90.


What dimensions? What weight?
"When the kayak is inflated: > length: 380 cm Width: 64 cm When stowed in its bag: > height: 94 cm Width: 50 cm > thickness: 27 cm > total weight: 18 kg (16 kayak Dimensions of the bag) + 2 hatch storage: 60 cm
An invention and a patent pending!
Where to go? Designing our dream kayak: a high-performing inflatable kayak you can take everywhere in its backpack, which means: freedom! To get there, it took 30 months of research and development and 7 prototypes - which we like to call the "monsters". The main challenge: bringing rigidity and high-performance to an inflatable kayak. Which is why we patented the cut shape and the unique blend of materials we used.
Why a rigid inflatable kayak?
"We listened to kayakers: "I'm a good kayaker and I want an inflatable kayak that performs like a hardshell." "I want to use public transport to go kayaking." "Inflatable kayaks are cool but I want a kayak that moves!" So we had to make a high-performing kayak that was easily transportable. Innovation was the only option.
Marc Roget, naval architect, tells us about his DECATHLON adventure:
"I came in to define the overall geometry and balance of the kayak. When Itiwit called me, I was surprised but very interested. I love kayaking, so we had that in common. We were able to build on our respective knowledge. It's an amazing experience!"
Why name it "Kayak X500 DropStitch"?
"The "dropstitch" is a material. Two layers of PVC are connected by thousands of polyester strands. During high-pressure inflation, these strands stretch and create a rigid chamber, preventing the kayak from distorting. Which is what makes our inflatable kayak extremely rigid but easy to stow in a backpack once deflated."
How was the design crafted?
True teamwork between the engineer, the architect and the product manager. Emmanuelle designed the product according to the technical constraints. Talk about functional design. The dark grey corresponds to paddling zone, the light grey to the cargo area and orange to visibility needs.
How to inflate and set up the kayak?
"1. Inflate the main chamber (floor), then the medium chambers (walls), followed by the small chambers (arches). All chambers are inflated to 10 PSI (0.7 bar) max. 2. You can insert the footholds into the soft slots, push them into the kayak, and adjust to the right length for your legs with the buckle. 3. Slot the seat into the provided holds. 4. Position the back rest under the coaming. We recommend the HP Itiwit (8387655) double-action hand pump, not included."
How to disassemble and deflate the kayak?
"Check out how easy it is! 1. Make sure the folding surface is clean. 2. Take out the seat. 3. Take out the foot rests. 4. Deflate the kayak by removing the plug and pressing the valve. (leave the valve in the open position so that air escapes when folding) 5. Tuck in the hatch and start folding lengthways."
How to fold it for stowing in the bag?
"1. We recommend you place the deck canvas on the inside of the fold. 2. Fold the keel along its entire length. This fold ensures that the width of the kayak is the same as that of the bag. 3. Fold each end towards the inside of the kayak and line up the ends with the Itiwit logo. 4. Slot the seat in the last fold of the kayak and finish expelling air from the kayak by pressing on it. 5. Finishing step: strap down the kayak (tight strapping will make it easier to store in the bag)."
What if the kayak is punctured?
"It would take something sharp to make that happen. If so, the kayak is composed of 5 independent "air chambers". 1 or 2 of punctures? The kayak floats enough to make it back to the shore safely. To preserve the life expectancy of your kayak, we advise you to avoid contact with oyster shells and sharp reefs."
The team has a few tips for your comfort.
"Olivier manages stock at Itiwit. Like the rest of the team, he's passionate about kayaking. His advice: "To get the most out of it, take the time to sit and get your balance, and adjust the foot rests. Once you're well installed, you can set off." Nico is product engineer, and he likes to set off with dry clothing in a small watertight bag. "You can store it in the nose of the kayak for easy access."
What's in the kayak bag?
The set includes: - the backpack - the kayak - the seat - the foot rests - a repair kit It does not include a skirt. The kayak is compatible with Itiwit skirt code: 8543915."

Users reviews

3.92 / 5 114 ratings
92 users recommended this product

At Decathlon, reviews are reliable.

  • Man
    50-59 years old
    23 September 2019
    Use since 2 to 8 weeks
    That review has been deposited on this product version
    Flawed Gem - Very user weight sensitive.

    Brilliant design and concept and really is awesome in terms of ease of set up and drying/deflation etc. Cuts through the water beautifully and looks great. However - it is very unforgiving in stability terms. I'm 75kg and at full pressure (10psi) it is very much sat on (not in) the water. I looked at the ITIWIT official images online and noticed it always looks lower in the water and has a gentle 'curve' vertically bow to stern when shown in use in those imsges. At my weight and 10psi mine was very high in the water and ruler flat front to back. So - I dropped pressures all round and that has significantly helped stability. it sits much more in the water than it did. I have a question for ITIWIT therefore. Did you design it this way deliberately? I can see it would be ok for around 100kg at 10psi but for lighter loads and users it's crazy high and tippy at that pressure? I would also ask you to develop an inflatable backrest as this would help immensely. It's brilliantly conceived and executed in the main but needs more primary stability and a more comfortable seat to perfect it. I'd be really keen to hear the design teams feedback on my pressure/user weight observation and the official images I mention online please? (From the ITIWIT adventure pages).

  • Man
    30-39 years old
    23 September 2019
    Use since 1 week or less
    That review has been deposited on this product version
    Exactly as expected... And maybe even better ;)

    I bought it yesterday, decided to take the weekend off (I am a bartender) and just, with no experience what so ever in kayaking loaded it with a tent, inflatable mattress, sleeping bag, a chair, food for 2 days, some clothes, some basic camping gears, and 7 liter of water (I even kept my wallet and passport with me, just to be sure that if something go wrong... Well it will be big time). I have to admit that I had to empty some water from the boat after 1h... I won't go to long about the first hour because I want to leave a positive review. But well, once you get the balance thing ok, your back and you hips are getting more relax (adjusting the foot support right helps a lot) I love everything about this kayak now, just crossed Iskar lake (that's in Bulgaria) on a straight line without any feeling of instability ( yes, you have to keep paddling). I just want to say thank you to the team at Itiwit. Keep on the good work
    Thomas, a happy customer :)

  • Man
    40-49 years old
    04 June 2019
    Use since 1 week or less
    That review has been deposited on this product version
    Great concept but too unstable to be practical

    I have three other (non-inflatable) kayaks and years of experience in various types of kayak but I tried this and found it to be quite unstable and difficult to keep upright in very calm sea conditions. I was accompanying an open water swimmer but could not spare a moment to be of service to him because I didn't dare take my hands off the paddle. Back in shallow water I tried some strong support strokes and rolling, neither of which resulted in success.
    I have a feeling it would be more stable if it had another 100kg of ballast in it but I'm sure that is not the intention with this concept. Looking at the boat from the side, it sits very high out of the water and although the seat position is nice and low (and comfortable) this isn't enough to give a feeling of security. Evidently the hull shape also contributes to the instability but I won't try to analyse that in detail. There is also very little in the way of solid decking to brace your knees against which is a disadvantage for this type of kayak. I would not want to use this on anything but still calm water and, as I bought it for short sea trips, I decided it was not for me.
    I would give it one star because I think it is a little unsafe for the vast majority of paddlers but I have given a second star for the shear ambition decathlon have in trying to pioneer a boat like this. The build quality is great, I just think the concept needs more development.
    I can't fault Decathlon's customer service either, they have refunded me with no quibbles, just as advertised.