The vanguard supreme 40f hard case is virtually indestructible and has innovative features for unmatched strength and durability its o ring sealed waterproof to a depth of 5 meters165 feet airtight and built to withstand the most extreme conditions from 40c 40f to 95c203f because of its automatic pressure equalization valve the vanguard supreme case is great for airline travel anti slip rubber feet and a solid carrying handle offer extra durability thick quick release latches