The Nupouch Waterproof Crossbody Bag is a messenger bag made for your active lifestyle. Made out of tri-layer vinyl material, these?crossbody/messenger bags will keep your belongings dry while you bike or hike or paddleboard.?Just fill the bag, roll the top over 3 times and connect the buckle. Whether on a boat, at the beach or even at a water park, the Nupouch crossbody waterproof bag will protect your stuff wherever you go. This bag has room for your smart phone, tablet, wallet, money, keys, extra clothes and lunch. Use the strap to carry it over your shoulder or crossbody style.