Harley-Davidson Rugged Twill 21" Convertible Duffel/Backpack - Heather Gray, 90325 HG. Easily converts from duffel to backpack. Embroidered H-D logo. Front zippered accessory pocket and roomy main section. Detachable adjustable shoulder strap. Hideaway padded backpack straps. Top and bottom carry handles for easy lifting. Can "piggy-back" over luggage handles. Size: 21" x 10" x 10". Note: 21" size can be carried on board most commercial airlines.