Virtually indestructible. the rugged Vanguard Supreme Series hard cases have innovative features for unmatched strength and durability. They are o-ring sealed. waterproof (up to a depth of 16.5 feet/5 meters). airtight. and built to withstand the most extreme conditions (-40F/-40C to 203F/95C). Supreme cases are great for airline travel with an automatic pressure equalization valve and ability to support up to 265 lbs/120 kg. of exterior weight. Anti-slip rubber feet and a solid carrying handle offer extra durability. Thick. quick-release latches lock in place and steel-reinforced lock holders are great for use with pad locks for added security. Supreme 37F has dense. customizable hexagon-shaped foam for an extremely tailored. custom fit for gear.