Leisure luggage refers to luggage with a trolley handle and wheels. It is widely used due to its convenience. Additionally, leisure luggage can be divided into single-tube and double-tube trolley handles, and the tubes can be either square or round, making it easier to drag while walking and greatly reducing the burden. Leisure luggage can be carried by hand or dragged. The wheels of the leisure luggage we commonly use are generally located at the bottom of the luggage. However, modern designers have created a new type of leisure luggage with a cylindrical shape, where the wheels are entirely wrapped around the outside of the luggage. This roller design allows the leisure luggage to better adapt to different terrains, such as easily navigating stairs by simply dragging the luggage. In 2012, the main materials used for leisure luggage included cloth, ABS hard luggage, leather, PC, etc., and the usability was divided into three categories: directional wheels, universal wheels, and the latest detachable universal wheel leisure luggage.