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. The case has unbreakable molded-in hasps that allow the addition of standard size padlocks. It has hinges with integrated feet that hold fast under impact, and create a flat surface for upright stability. It is carried by a double-layered, soft-grip, solid-core handle that provides strong, durable comfort.