Backpacks are commonly used by hikers and students, and they tend to be the best bag for carrying heavy loads or other equipment, because the bag's ability to carry heavy loads over a long period of time is still OK.

　　Leimand laptop backpack manufacturers introduce large backpacks to carry more than 10 kg (22 lbs), and smaller sports (such as running, cycling, backpacking and hiking), usually put a large part (about 90%) of the weight on the padded hip straps allow the shoulder straps to primarily stabilize the load. This improves load potential as the hips are stronger than the shoulders and increases agility and balance as the load rides closer to the user's own center mass.

　　In ancient times, backpacks were used as a means for hunters to carry games and other types of game and a way to more easily transport other materials. In the case of larger hunts, the hunters would dismember the prey and distribute the animals in pieces of paper, with each pack of meat cut into many packs and then placing them on their backs in bags. The intestines are braided tightly together to make a strong thread-like material.

　　backpack design

　　simple backpack design is a bag with a set of shoulder straps. These bags are used for transporting goods in general, variable capacity. Simple designs consist of a main pocket, possibly incorporating webbing or rope straps, while more complex models add additional pockets, waist belts, chest straps, shoulder pads, pads, and sometimes reflective material for added safety at night. These bags are usually produced at low cost.

　　Leimand Laptop Backpack Manufacturers introduce some outdoor bags, especially those whose prices have increased, ultralight backpacks and mountaineering are sometimes frameless. The design safety of these backpacks has been rejected by many companies as "unsafe".