Lightweight, watertight cases are ideal for storing cameras, portable computers, flares, radios or anything else you want to keep dry and well protected. Made of virtually indestructible structural resin, they wont crack, dent or corrode. Waterproof to 30', the large O-ring seal works so well that these safety cases come with a purge valve so you can open them after a change in air pressure. The laptop computer case has a lid organizer and fitted tray. Includes a shoulder strap and a fold-down handle.