aLOKSAK Waterproof Bags (Multi-Pack)DESCRIPTION Tested and approved by the US Navy NEDU (Navy Experimental Dive Unit), NASDS and North American Fishing Club. Leak proof airtight seal, Water Air Dust proof, Certified at 200 ft depths, FDA approved material, Cold rated to 40, flexible and shatterproof, reusable and recyclable. Keeps items dry under water to depths below 200 feet 60 meters for periods of years. Safe, shatterproof, quiet, holds oddly shaped objects. Simple as using a