Designed to protect various electronics including external hard drives,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) 11.11" x 7.92" x 1.63" (28.2 x 20.1 x 4.1 cm),Dimensions: Exterior ( L x W x D) 12.38" x 9.75" x 2.13" (31.4 x 24.8 x 5.4 cm)