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 2L size is perfect for small belongings like keys, money, and a smart phone. Clip it to your bathing suit and you can carry those important things with you all day.