Pelican S115 Elite Sport Backpack (Black) Built-In Watertight, Crushproof Case Top-Loading, Fast Access - TSA Ready & Under Seat Convenient Slim case for use with Ultrabook laptops up to 15", also 17" Apple laptops. Weight-8.65 lbs (3.9 kg) Pressure Equalization Valve - Prevents Vacuum Lock. Watertight to 1 meter for 30 min - O-Ring Gasket Sealed (Case portion only. Backpack is not watertight) Large sized padded divider compartment - Holds multiple bodies, lenses, flash, etc.