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Itiwit 20 L Waterproof Backpack

Sale price: $59.99 Regular price:

This 20 L backpack lets you carry your belongings and protect them from splashes of water and brief immersion. Ideal for kayaking, stand-up paddling or light sailing.

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Sale price: $59.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8387665

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Product Features

Itiwit 20 L Waterproof Backpack is designed for Our team of fellow paddlers designed this 20 L waterproof backpack to carry and protect your belongings from getting wet when doing water sports.

This 20 L backpack lets you carry your belongings and protect them from splashes of water and brief immersion. Ideal for kayaking, stand-up paddling or light sailing.

A photo of the Itiwit 20 L Waterproof Backpack in use


Resistant to splashes, spray and brief immersion.


20 L usable capacity to hold small belongings and spare clothes

Carrying comfort

Ergonomic, adjustable, thick foam-padded shoulder straps.


PU coated and TPU laminated polyester material.


1 inner A4 pocket and a small zipped pocket for a wallet.


Easy to attach to an SUP or a kayak thanks to its attachment straps.


0% PVC

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Itiwit 20 L Waterproof Backpack,pearl gray 

Itiwit 20 L Waterproof Backpack,pearl gray

Product Customer Reviews

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Itiwit 20 L Waterproof Backpack,pearl gray
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Overall good bag

This bag is great to keep stuff safe but it could be a little bit more practical. There is no way to adjust the clasp to close the bag. Meaning that if you have an article a little bit bigger you will not be able to close the bag.

Fills my daily needs, but wish for a little more

I ride bicycle to/from work and pack my office clothes inside no matter the weather conditions may be (snow, rain or shine). I purchase previously the 16 liters Tribord waterproof backpack. That one is sometimes a little small during winter when I pack more layers of warm clothes, a pair of shoes and my tablet/laptop with its accessories. This 20 liters waterproof backpack can fulfill my needs for the winter rides, but I wish the following features could be considered: 1. Add an external waterproof pocket just like on the old 16 liters Tribord waterproof backpack, so that small items like keys or wallet can be quickly stored without reopening the whole backpack. 2. Add an adjustable cord on both side clips just like the 16 liters Tribord waterproof backpack. 3. Add an inner bottom and back cushion to protect items that are carried. 4. In addition to the chest clip, add a waist clip that can help to keep the backpack close to the body when running.

Good bag and definitely waterproof

I love this bag, it’s stylish and it does it’s job. The only thing I’d change is adding a few compartments. Once your stuff is inside it takes a while to get things out. I’m using it for general use on rainy days.

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Good bag needs improvement though

The attachments to do up the bag are not adjustable so really hard to close up quickly on the water. Also the chest strap is not women friendly boobs get in the way. However, the actual bag is very waterproof

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Waterproof bag

Brilliant bag for all seasons, especially with the British weather. Keeps everything dry, so spare clothes and important documents are completely safe and protected

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Overall very pleased.

Can’t give more than good yet as it has so far only had relatively limited use. It if lasts well, and remains waterproof, then I would say excellent, but too soon for that.

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Simply does the job with no fuss, a great product. Used and much admired by others

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ITIWIT 20L watertight backpack

Quite simply, this is the best quality and value for money waterproof backpack on the market. I have a Patagonia and North Face - but this knocks the spots off them! If a larger (30L or 40L ) version is available, then you have an even better product!

Excellent bag for cycling

Perfect size for clothes, shoes and a laptop on my daily commute. Really comfortable straps and easy to fold. One addition that would be great would be a small exterior pocket for phone/wallet. Other than that it's incredible value when compared with other water-tight brands.

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Good backpack but more sizes would be better

The backpack has a really good quality (e.g. comfortable shoulder straps, easy to use folding strap, pockets inside the backpack) however I returned it as it was too small after all. @Decathlon: Please make more sizes available! I would have preferred 30L or more.

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Reasonably priced waterproof bag

Bought this bag for my son who's cycling around Europe and Central Asia. It is ideal, very sturdy, waterproof and very reasonably priced when compared to alternatives.

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Great waterproof feature

It is large enough to put all my stuff and it's strong waterproof feature completely protects the things from water.

Great waterproof feature

This product has very good waterproof feature that products inside will never get wet. It is also large enough to carry many stuffs to practice watersports or go to the beach.

Good Price

Good Price, Good Quality

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Excellent !!!

Nice product

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Additional Product Information


Main fabric

  • 60% Polyester cationic
  • 40% Thermoplastic polyurethane

Precautions for electronic devices

Electronic devices are fragile and valuable. We recommend doubling up their protection by putting phones in waterproof pouches inside dry bags. Cameras can be put in a small dry bag (5 L or 10 L) placed inside a large dry bag (20 L, 30 L, 40 L, 60 L). Ensure your bags are closed and check water resistance regularly before your session using a paper towel.

Fastening system

To ensure good water resistance: 1 / roll the top of the bag over carefully 5 times, folding tightly over the width of the strap 2/ fasten the central buckle 3/ fasten the side buckles Leave some air in the bag. The bag should appear inflated once closed: this makes it more watertight and allows it to float if dropped in the water.

Attachment on a stand up paddle or a kayak

The 2 compression straps on the body of the bag can be used to attach the backpack to an SUP or a kayak equipped with fastening loops, enabling you to carry your belongings into the water and protect them.

Technical dimensions

Waterproof capacity when closed: 20 liters (1220.5 in³) Height: 17.7" Width: 11.8" Thickness: 7.9" Weight: 1.6 lbs



Product testing

WATER RESISTANCE TESTS: TEST 1: "PUDDLE OF WATER" The bag is resistant to shallow immersion for 8 hours in 4" of water. This test corresponds to a bag floating in a water-filled boat or to a brief fall into the water. TEST 2: "SHOWER" The bag is resistant to a shower of 450 L/m²/h lasting 4 hours. This test corresponds to heavy rains or splashes from waves.

Storage instructions

Rinse with clean water and dry the product before storing for long periods to keep the materials in good condition.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual