This 3 pc. Set is made of polycarbonate/ABS. Polycarbonate is the same material used to manufacturer bullet proof glass. This material is extremely lightweight, durable, and protects the contents of your luggage. Eight multi directional spinner wheels rotate 360 degrees for easy maneuverability. This luggage allows you to pack more while avoiding the excess weight surcharges imposed by most airlines. 20"X13"x9" weighs 6 lbs, 24" x15"x10" weights 8 lbs, 28"x17"x12" weighs 10 lbs.