Travelers Choice Tasmania 21 Inch Expandable Spinner Luggage, Dark Brown 100% Pure Polycarbonate allows the shell to absorb impact by flexing when under stress Interior lid with U zip mesh cover and tie-tapes to secure belongings Convenient add-a-bag strap for carrying additional bags Expansion gusset offers 25% more packing capacity Dual spinner wheels provide smooth and quiet 360 degree maneuverability