This 3 pc. Set is made of polycarbonate/ABS. Polycarbonate is the same material used to manufacturer bullet proof glass. The major benefits of this material - it is extremely lightweight it is 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 airlinesMulti-directional spinner wheels for easy maneuverability ,odern internal chrome telescoping handle with push button handle. Interior mesh and zip pocket and elastic pocket * 5 year warranty * 20"X13"x9" weighs 6 lbs 24" x15"x10" weights 8 lbs 28"x17"x12" weighs 10 lbs.