DRY PAKs hermetically seal out water, sand and dust. Simply twist the knobs to open. If you drop it in water, it will float and your belongings are protected, period! 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. If you have a specific item that you want to protect, measure it first and check the maximum circumference dimensions that we provide. Clear TPU front and back camera window with high visibility border Adjustable neck lanyard & anodized aluminum spring hook Bright sealing clip for high visibility For beach, pool, boating, snorkeling and more Maximum circumference 4X6 & 4X8 case: 7. Complete product description on Desktop version.