Waterproof Backpack 20L - Black

Ref. : 8387664

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

This 20L 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.

Color: carbon grey

Unique size
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Our services :

  • Free delivery for Decathlon brands orders above $399
  • All Decathlon products are eligible for lifetime return

Products benefits


Resistant to splashes, spray and brief immersion.


20L usable capacity to hold small belongings and spare clothes

Carrying comfort

Ergonomic, adjustable, thick foam-padded shoulder straps.


PU coated & 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.


Waterproof Backpack 20L - Black
Waterproof Backpack 20L - Black
Waterproof Backpack 20L - Black
Waterproof Backpack 20L - Black

Technical information

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 (5L or 10L) placed inside a large dry bag (20L, 30L, 40L, 60L).
Ensure your bags are closed and check water resistance regularly before your session using a paper towel.

Fastening system

To ensure good water resistance:
/ 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 litres

Height: 45 cm
Width: 30 cm
Thickness: 20 cm
Weight: 726 g


2 years


Product concept & technology

Product Composition

Main fabric 60% Polyester, 40% Thermoplastic Polyurethane


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

User Restrictions

Not suitable for canyoning or snorkelling (long immersion).



The bag is resistant to shallow immersion for 8 hours in 10 cm of water.
This test corresponds to a bag floating in a water-filled boat or to a brief fall into the water.

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.

Maintenance advice

Hand wash

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean

User reviews

Questions & Answers