The Orca Waterproof backpack is a multi purpose courier style bag built of tough and durable PVC. It has a top which can be rolled up and locked into place, keeping contents dry. The large main compartment is perfect to stow shoes, garments, towels and wetsuits. A smaller front compartment with a waterproof zip holds valuables and smaller items, while th elastic toggles on the outside store wet gear or cycle helmets. The padded adjustable backpack style straps and waist and chest straps keep the backpackcomfortable and secure. A small compartment on the waist strap is ideal for a music player, wallet or phone.