The Basin deck and board bag attaches to your SUP board or kayak allowing you to carry personal items such as water, flip flops, sunscreen and towels with you on your paddle adventure. The Basin is 100% waterproof and highly functional thanks to the two-way purge valve on the bottom. Simply roll down the top closure and secure it shut, then you can open the valve and squeeze out any captured air, or trap air inside so the pack will float. The two-way valve even doubles as a draining tool if you want to fill it with ice and use the backpack as a portable water-cooler!Specs:Materials: High Quality Marine Grade VinylVolume: 20 liters / 1220.5 cubic inchesWeight: 3 lbsSupport: Ergonomic padded mesh shoulder and waist / hip strapsPockets / Straps:External:2 top tote handles: 1 rubber coated / 1 nylon3 stitched loop daisy chainsDurable coated mesh front pocketMesh side tall water bottle pocketTwo adjustable length utility cordsDurable suction cupsInternal:1 front internal zip convenience waterproof pocket20 liter 100% water proof main compartment***DryCASE will donate a percentage of every pink Basin sold to the Pretty in Pink Foundation. Donations will provide financial support for those fighting breast cancer without insurance.