Maximum airline check-in size Waterproof, crushproof, dustproof Super-light proprietary HPX 2 Polymer - up to 40% lighter Press and Pull Latches Retractable extension trolley handle Quiet rolling stainless-steel bearing wheels Pick N Pluck foam Fold down over-molded handle Waterproof O-ring seal Business card holder Automatic pressure equalization valve - balances interior pressure, keeps water out Stainless steel padlock protectors IP67 & MIL-SPEC certified Made in the USA