Travel bags are generally divided into three types: DUFFLE BAGS, gym bags and trolley. DUFFLE BAGS can generally be directly carried or slanted across, with strong functionality. Most of the applicable scenarios are for short distance travel or business trip. Gym bags is generally made of waterproof material or nylon, which is mainly suitable for indoor or outdoor fitness enthusiasts. Trolley has wheels that can be dragged. Compared with long-distance travelers, trolley has a variety of sizes to choose from.