Premium Quality Waterproof Guarantee -- Idefair Waterproof bag Provides waterproof protection for your phones, camera, clothes, and documents from Water, Sand, Dust and Dirt.Keep your gear protected no matter what the conditions! Perfect for Multiple Occasion -- Dry Bags keep your belongings safe and dry for various activity. Ideal for motor boats, sailboats, personal watercraft, kayaks, canoes, camping, fishing, motorcycles, ATVs, snowmobiles and porters. Adjustable Shoulder Strap -- Comes With an Extra Long Removable and Adjustable Shoulder Sling for Easy Carry and Transport. With Waterproof Waist Pouch -- We offer a waist pouch so that you could put your wallet, car keys and watch in it. The strap of this pouch is also adjustable for fitting your comfort and convenience to carry it. Different Size Perfect For Your Need -- 5L, 10L, 15L, 20L, 30L to meet your demands on different occasions,suitable for both kids and adults. Idefair provides you an adjustable function. Product Description Shoulder Strap: 5L,10L and 15L includes a single detachable shoulder strap , which can be cross-body or shoulder-carried 20L and 30L include double detachable shoulder straps , which can be worn cross-body or used as a backpack 5L/10L/15L/20L/30L Each Container Can Hold Items: 5L small dry bag is suitable for small items such as mobile phones and keys. 10L/15L dry bag is medium in size, suitable for short trips to pack small items. Suitable for protecting clothes, mobile phones, toiletries, wallets, glasses, swimwear, waterproof shoes and swimming goggles, etc. 20L dry bag backpack can carry the items you need for a day trip. Suitable for protecting clothes, shoes, bath towels, binoculars, cameras, food, etc. 30L dry bag backpack is suitable for traveling more than one day. Suitable for protecting more clothes, life-saving bags, parachute hammocks, ponchos, water containers, etc.