Karana OceanPack dry tube bag is good for storing your dry gears when theoutside is wet. It is made from heavy duty and durable TARPAULINPVC material and produced with EWS (Electronic Welding Seam) thatelectronically welded the material at molecular level into a seamthat is strong and waterproof. The Roll Down system with a pair ofdark Tarpaulin strips increase the effectiveness of the waterproofseal. This is done by simply squeezing out the trapped air and fold3 times and buckle up. Leave some air trappedinside to improve buoyancy should it fall into thewater.