Nupouch waterproof bags keep your belongings dry while being vibrant and colorful. Made out of tri-layer vinyl material, these traditional dry bags utilize a roll top seal to keep water out. Just fill the bag, roll the top over 3 times and connect the buckle. Whether on a boat, the beach or even at a water park, Nupouch waterproof bags will protect your stuff wherever you go. The 5L size is just the right size to use as a purse. There is enough room for your smart phone, wallet, keys, and even a small tablet. A sholder strap is included for easy carrying.