Durability - 100% Aluminum Made with a One Piece Mold Design + 5 Year WarrantyFunctionality - Interior Space Dividers, X-bands, and pocketsSecurity - Dual TSA Approved Combo Locks (Keyless and Zipperless)STYLE - Ultra Quiet Hinomoto (Japan) Wheels SpinnerThick Aluminum Three Stage Height Adjustable Pull Rod for Extra Bag Support