features roll-top closure to keep your belongings dry. With 35L large capacity, it is a great choice forcycling, motorcycling, camping, hiking, swimming, kayaking, traveling, and other outdoor activities. Features: Made from PVC material, IPX7 waterproof and durable. Large-capacity main compartment with roll top closure keep your belongings dry. Front pocket with adjustable compression straps for holding your swimming flippers or wet items. Mesh side pocket for water bottle. Reflective accents for added visibility and safety at night. 2 air vents for good ventilation, draining away water and air. Ergonomic padded back and adjustable shoulder straps for all-around comfort. 35L large capacity, perfect for cycling, motorcycling, camping, hiking, swimming, kayaking, traveling, and other outdoor activities.