100% Waterproof and durable: This dry bag backpack is made from 500D waterproof canvas. High-frequency welded seams for waterproof protection and durability, ensure your belongings and valuables stay dry when you play water sports. Easy to use and tear-resistant: Just put your gear into a dry bag, grab the tape on top and roll it down tightly 3 to 5 times then clip the buckle to make a mark; The whole process was very fast, adding to the stress of D-Ring With double stitching, no more tearing, even for heavy loads of various sizes and portable styles: 2L,5L Dry Bag Including One Adjustable and Detachable Shoulder Strap for Crossbody, 10L, Dry Backpack 20L and 30L Large Capacity Backpack with Two Straps for Carrying, Meeting Your Needs on Various Occasions, High Definition Window, Touch-Friendly Design with 100% Safe Seal Lock Which is suitable for all types of water sports. This bag can float after rolling and bending, so you can easily track your equipment without worrying about your items getting wet again. Suitable for paddling, SUP, kayaking, rowing, sailing, canoeing, surfing or having fun on the beach.