travel backpack carry-on KAKA Wear-resistant Durable Backpack-Duffle Bag. Travel Bag Design: A fusion suitcase design of the main zipper bag, two front zipper pockets and a side mesh bag, a side handle, equipped with a removable shoulder strap. Hybrid (Backpack/Duffle Bag/Shoulder Bag/Travel Bag) conversion. Can be used several different ways. Our product provides a all in one system design that allows you to pack for traveling, business meetings,outdoor activities while conveniently accommodating you with comfort and safety for your personal items.