Unbreakable, watertight, dustproof, chemical resistant and corrosion proof. These are some of the features of the Pelican Protector Case™ that offers total protection for your equipment. It is made of Ultra High Impact structural copolymer that makes it extremely strong and durable. Its exclusive 1/4″ (6.4 mm) neoprene o-ring and ABS latches seal perfectly and includes an automatic purge valve for quick equalization after changes in atmospheric pressure