ZUCA "Into The Woods Sport Insert Bag with Sport Frame (Choose Your Frame Color) Inspired by aerospace technology, the aluminum alloy frame is light, super strong and rated to safely support up to 300 lbs The removable, hand washable, Insert Bag is made from premium water resistant 600D polyester The dual wheel system climbs stairs and curbs with ease Magneto dynamic 4 This bag DOES NOT meet FAA specifications for carry-on baggage