ProX VAULTX XM-1201 Universal Watertight Large Briefcase W-Pluck-N-Pak FoamProX XM 1201 VaultX Universal Watertight Large Briefcase W Pluck N Pak Foam Description ProX's XM 1201VaultX Briefcase series cases are made from an extremely tough Polypropylene Copolymer, these cases are crush resistant and virtually indestructible. This rugged case features a 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