Travelon Wheeled Under Seat Anti-Theft Carry-On with Back-Up Bag - Black Large main compartment, front organizer compartment, zippered front pocket and water bottle pocket Full-size back-up bag folds for compact storage Fits beneath airplane seat Add-A-Bag Strap Large main compartment Front organizer compartment and zippered front pocket Water bottle pocket Full-size back-up bag folds for compact storage Fits beneath airplane seat and Add-A-Bag Strap