The desert tan Pelican 1690 Transport Case Without Foam is an unbreakable, watertight, airtight, dust-proof, 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" neoprene O-ring, easy open double throw latches that seal perfectly and includes an automatic purge valve for quick equalization after changes in atmospheric pressure.