1.Durable Material:ALLBEYOND waterproof dry bag is made of 500D tarpaulin , 0.52mm thickness material, which is the toughest waterproof material known to man. It is durable, ripstop, very strong. 2.ALLBEYOND waterproof dry bag is perfect for kayaking, travelling, boating, white water rafting, hiking, camping, hunting, skiing, snowboarding. Our waterproof bag could protect your values, and keep them safe and dry on your adventures. 3.Different capacity and different colors meet your different demand. 5L waterproof bag is for small valus, such as wallet, phone and etc. 10L dry bag is compact and popular, very practical for packing small valuable possessions for short trip. Suitable for protecting wallet, keys, towel, toiletries, cell phone, sunglasses, camera, water bottle etc.20L dry bag backpack is big enough to carry everything you need for a day trip. Suitable for protecting clothes, shoes, tablet PC, bath towel, flashlight, telescope, handtools, poncho, notebook, food container etc.30L dry bag backpack is for the trips more than a day. Suitable for protecting clothes, survival kits, parachute hammock, water containers etc 4.Shoulder strap: The width is 1.5”, the length could be adjust 25” to 44”. 5L ,10L ,20L waterproof dry bag include single detachable strap for cross-body or over the shoulder carrying.30L include double detachable straps, you can use either one strap for cross-body, or use two straps as backpack. 5.The size of waterproof dry bag: When unfold,5L is 16.14”(L)x11.6”(W), 10L is 21.65”(L)x11.6”(W),20L is 23.62”(L)x14.5”(W), 30L is 28.34”(L)x14.56”(W). When in use, 5L is 7.5”(D)x9.45”(L), 10L is 7.5”(D)x13.78”(L), 20L is 9.45”(D)x15.75(L), 30L is 9.45”(D)x20.86(L). The size of waterproof phone case is 7.5”x3.9”. 6.The package: Each waterproof dry bag in a PVC bag. The total weight of waterproof bag (including waterproof phone case and shoulder strip) , 5L is 12.35ounce, 10L is 14.8ounce, 20L is 17.8ounce, 30L is 22.61ounce.