􀀹 Four multidirectional spinner wheels assure smooth maneuverability and stability on virtually any surface the user encounters and keeps weight off your arm (upright trolleys).   􀀹Lightweight Fiberglass frame with graphite corners for strength and durability.   􀀹Main material is constructed of durable 1682 Bullet Proof Ballistic nylon with EVA foam backing for long lasting use.   􀀹Trolley expands up to 2.5 inches for additional packing space if needed.  􀀹Add-a-Bag clip with adjustable webbing strap allows additional bags to be carried effortlessly.   􀀹Ergonomic recessed extra long handle locks in two positions to accommodate 2 or 4 wheel use. Made of lightweight industrial grade aluminum, it has an easy access push button to lock and release easily with one hand.  􀀹Skid bar, reinforced corners and kick plate offer additional protection and minimizes impact at key stress points.   􀀹Guardian self repairing interlocking #10 nylon coil zippers on the main openings. 􀀹Corrosion Guard Die Cast Hardware, solid steel rivets and Weather tight™ seams for tough durability.  􀀹 Integrated privacy ID tag.