Boyt Luggage Mid-size Expandable Glider, Black, One Size Super-premium ballistic nylon resists abrasions, water and dirt High performance ykk racquet coil zippers provide maximum durability with ultra smooth operation Ergonomic, custom zipper pulls with special quick repair feature Lite as air construction with reinforced stress zones Aircraft-grade aluminum telescopic handles with ultra smooth, single-touch operation and cushioned comfort grip