ProX XM-1101HW VaultX Watertight CaseProX's VaultX series cases are made from Polypropylene Copolymer, these cases are crush resistant, and virtually indestructible. This rugged case features an sealed ring, which makes it Airtight and Watertight. The automatic air pressure release valve will equalize the air pressure, which allows this case to be airline friendly! It is ATA TSA approved. There is convoluted foam glued into the lid, and a removable pluckable foam set in the base will