A backpack

A backpack, also known as a backpack, is a luggage bag that comes with one to two shoulder straps and can be hung on the human back. From the use of modern military load items, it has developed into a modern backpack. Although there have been improvements in both construction and materials, its main construction system is still shoulder straps and luggage bags. Due to the difficulty of carrying heavy objects with both hands alone, backpacks are often the preferred tool for carrying or transporting heavy objects.