The Otterbox Drybox 3250 Series is waterproof up to 90 feet for 30 minutes and is made from polycarbonate construction with interior foam for added protection! With stainless steel hinge pins and latch pins, the latches are durable and easy to open. The case also has a pressure release slot and utility mounts for straps and carabiners, making it easy to keep the box attached to your gear! Internal dimensions measure 6.89" x 3.70" x 2.01".