Traveler's Choice Siena 21" Hybrid Hard-Shell Rolling Garment Bag/Up Polycarbonate Buckle Zipper closure Worlds first two-compartment hybrid hard shell design in market Made of 1680 denier ballistic fabric, same material used in developing bullet proof vests for military purposes The abs materials give the shell greater rigidity so that it will not permanently deform when under pressure Two exterior zippered front pockets for boarding passes, travel documents, etc Multiple-stage self-locking retractable push button handle system