Material: PVC+Mesh Size: 25 * 17 * 42 cm Capacity: 25L Color: Yellow, Blue, Black Quantity: 1 pc Package Contents: 1 x Waterproof Bag 1. Professional Waterproof Technology: Our dry backpack is made of 100% waterproof 500D PVC material with a roll-top closure, making it extremely durable, lightweight, and tear-resistant, protecting your belongings from dust, sand, dirt, and water. 2. Soft Strap Design: Ordinary dry bag shoulder straps are too stiff or uncomfortable to carry. Our waterproof backpacks feature ergonomic adjustable double shoulder straps and long straps for versatile carrying options. 3. Perfect Medium Size: 25L is large enough to carry 2 towels, 2 sets of adult clothes, 2 sets of swimwear, 2 pairs of slippers, a flashlight, a telescope, and other personal items. The unique splash-proof zippered outer pocket protects small items. 4. Multifunctional: The dry bag can float on water after rolling, allowing you to easily track your gear. Our waterproof backpack is ideal for boating, kayaking, paddling, sailing, canoeing, surfing, fishing, skiing, camping, the beach, etc. 5. Practical Design: The strap on the waterproof bag is removable, and can be used as a shoulder bag, handbag, or backpack. When not in use, it can be rolled or folded, saving space and making it portable. Our waterproof dry bag backpack comes with a detachable strap and comfortably adapts to all body types.