Dry Paks are an absolute necessity for today's on-the-go active lifestyle. Whatever activities you enjoy in or near water, there is a Dry Pak for you. Dry Pak provides simple, user-friendly, effective protection for cell phones, cameras, GPSs, PDAs, and lots of other gear. All Dry Pak items have cam lock clips on top that hermetically seal out water, sand and dust. Simply twist the knobs upwards 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 Dry Pak identify only a few uses and activities for each case, it's highly likely that you'll find other applications for you Dry Pak. Dry Pak...the perfect choice for the active outdoor enthusiast!