Dry Pak's are an absolute necessity for today's on-the-go active life style. Whatever activity you enjoy in or near the water there's a Dry Pak for you. Dry Pak's provide simple, user-friendly, effective protection for cell phones, cameras, GPS, PDA's, Game Boy and lots of other gear. All Dry Pak's have cam lock clips on top that hermetically seal out water, sand, and dust. Simply twist the knobs upward to open; twist back down to seal. It's that simple! All cases are securely ultrasonically welded to the top clips, so there are no parts to lose. Although we identify only a few popular uses and activities for each case, it's highly likely that you'll find other applications for your Dry Pak. The camera case is made from hi-tech thermo-plastic polyurethane (TPU). TPU is approximately 10 times stronger than vinyl and has incredible resistance to hot and cold temperatures. Sound transmits through TPU with less than 5% loss of volume, making it perfect for a camera.