Samsonite LIFT 29" Spinner Expandable (29", Blue) 100% Nylon Fabric lining Unbreakable zipper pullers and interlocking, kissing zipper heads Four, multi-directional spinner wheels for easy mobility. Rolls upright so there is no weight on your arm. Ecto-skeletal wheel hubs in grey AEPE (air expanded poly ethylene) material is extremely light, strong and resists abrasion or puncture