Zuca "Mystic" Sport Insert Bag and Black Frame with Flashing Wheels 39.5" Telescoping handle. Gear platform to carry additional load. Inspired by aerospace technology, the aluminum alloy frame is light, super strong and rated to safely support up to 300 lbs The removable ZCA Insert Bag is made from premium water resistant 600D polyester and is hand washable The dual wheel system climbs stairs and curbs with ease. Magneto dynamic 4" polyurethane wheels absorb shock and make for a seriously silent ride. Feet, made of nylon 6, go easy on scratchable surfaces.