Designed to protect 15" laptops,Pick N Pluck with convoluted lid foam,Watertight, crushproof, and dustproof,Watertight Gasket - Tight seal created when case is shut,The easy open latch remains shut under pressure or after impact,Automatic Purge Valve - Keeps water and dust out while balancing air pressure,Removable shoulder strap included,Lifetime Guarantee of Excellence,Dimensions: Interior (L x W x D) 15.78" x 11.16" x 2.06" (40.1 x 28.3 x 5.2 cm),Dimensions: Exterior (L x W x D) 17.18" x 13.24" x 2.60" (43.6 x 33.6 x 6.6 cm)