The Pelican 1440 Top Loader Case with Foam (Black) is an unbreakable, watertight, airtight, dustproof, chemical-resistant and corrosion-proof hard case used to carry any kind of equipment that needs to be protected from the elements. It is made of ultra high impact structural copolymer that makes it extremely strong and durable. It has a 0.25" (6.4mm) neoprene o-ring, double throw ABS latches that seal perfectly and includes pressure equalization valve for quick equalization after changes in atmospheric pressure.