The Otter Box 3500 Series case is waterproof, crushproof AND watertight. These cases are perfect for protecting your valuables from the elements, whatever they may be. The Otter Box 3500 offers watertight protection and storage for pagers, car keys, film, batteries, credit cards, wallets, cell phones, GPS, hand held PC's, cameras, Game Boy, and so much more. The Otter Box is a patenteddry box designed to handle full submersions--up to 100 feet! The solid color boxes provide nearly 100% UV protection. The main caseseal is made from a foamed silicone cord. The plastic used to make the colored Otter Boxes is an ABS plastic that's reinforced with fiberglass. The hinge pins are made from marine grade 316 Stainless Steel which is the standard choice for salt and freshwater applications. The material used to make the foam liners is open cell polypropylene foam.