Amazon.com: WITZMAN Travel Backpack for Men 40L Large Carry 。?3 in 1 CONVERTIBLE TRAVEL BACKPACK. This carry on backpack designed as a convertible backpack (backpack, cross-body bag, duffel bag backpack), this travel backpack can use several different carrying methods to give you a different experience. ?LOTS OF STORAGE SPACE & POCKETS. The travel backpack with a main compartment and a 17.3 inch laptop compartment, it has independent pockets inside, in which small items can be easily stored. And there is a shoes compartment, make your items organized and easier to find. ?LARGE CAPACITY & FLIGHT APPROVED. The size of this large travel backpack is 51 x 32 x 20 cm (20.1 x 12.5 x 7.9 inches), Up to 40L travel backpack. Unique design and fashion, well made for weekend trip or international airplane travel, and the carry on backpack meets the most maximum size requirements, can be fit under the seat or overhead bin, travel backpack carry on flight approved. ?STURDY MATERIALS & SOLID. Made of canvas, leather handle and polyester lining, metal zippers and buckles. Ensure long-lasting usage. Comfortable design gives you maximum back support. Breathable and adjustable shoulder straps relieve the stress of shoulder for a long time carry on. ?MULTI-FUNCTIONAL. This canvas backpack can be used as carry on travel backpack, work bag, daypack, overnight bag, weekender bag, travel bag. Backpack for travel, hiking, outdoor, and camping.