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 personal credentials 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 weldedto 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.