The backpack is mainly used for storing equipment and drinking water during outdoor activities, emphasizing its versatility. It has various layers and can be classified to store different items. Facing the various needs of traveling, we have to store different items such as clothing and equipment separately, and backpacks can easily solve this problem. In addition, the firmness of the backpack is also extremely strong, as it needs to adapt to different outdoor environments, be able to cope with different weather conditions such as rain, scorching sun, and different places.