For travel by air, Pelican has aggregated available airline rules for maximum overhead and check-in dimensions with the goal of creating a case that conforms to their requirements. Of course, there will always be exceptions, so it's wise to contact your carrier before departing. Your 1535TRVL case is made of a super-light, proprietary HPX polymer (with honeycomb structural elements) that is up to 40% lighter than most other Pelican polymers. This confidence-inspiring design has been drop-tested on concrete on all sides and corners while loaded with gear. The case is also tested with a 28-pound steel dart dropped from a height of three feet, submerged for 30 minutes at a depth of 3.3 feet, and the wheels are roll tested over 1000 yards with loads at 5 mph. The case has ABS double-throw latches that accept a user-supplied padlock, a watertight O-ring gasket, an automatic purge valve, and stainless steel hasp protectors. Users will appreciate the conic-curved lid shape, the rubber overmolded handles, and the extending trolley handle. For easy case identification, a removable polycarbonate card holder may be placed on the front or side of the case. Lid organizers have zippered compartments for stowing larger items and see-through mesh pockets secure passports and cables. Packing cubes keep gear tightly bundled and allow you to arrange your gear by stacking or grouping side by side.