The product is waterproof. Volume: 35L Width: 42 cm Height: 50 cm Safe closure at the top. One outer compartment with zipper. Adjustable shoulder straps with adjustable sternum strap. Practical fasteners on the outside. Waterproof Backpack bag by Swedemount. Roomy, lightweight backpack with adjustable bands. Two practical compartments. Waterproof material perfect for the sea or lake.