The Pelican iM3300 Storm Case with Foam (Olive Drab) is an injection-molded case made of HPX high performance resin, that is virtually unbreakable, dent-resistant and shatter-resistant. It is tough, rugged, lightweight, airtight and watertight. There is a permanently attached Vortex valve that automatically adjusts air pressure without letting in water, and won't unscrew from the case. Press & Pull latches open with the push of a button, yet stay closed securely under impact or stress.