The Od Green Pelican 1650 Case with Foam is an unbreakable, watertight, airtight, dustproof, chemical-resistant, and corrosion proof hard case that can be used to carry and protect your equipment from the elements. It is made with ultra high-impact structural copolymer for strength and durability. It has a 0.25" neoprene O-ring, ABS latches, and includes an automatic purge valve for quick equalization after changes in atmospheric pressure.