Waistpack is a lightweight and compact type of outdoor travel bag for sports. It is small in size and easy to carry, and is usually worn around the waist, so it is called a waist pack. The main function of a waist bag is similar to a wallet, used to store valuable items such as mobile phones, passports, etc. Due to the fact that some small and valuable items are easily mixed up in large items and cannot be found, they can be kept in a backpack, which is very convenient to find and will not be overlooked and lost.