high school and junior high school students' elementary school backpack set of four or five simple backpack manufacturers

the design of shoulder straps, back cushions and other items in children's backpacks should take into account children's comfort to reduce the burden on their shoulders and back durable materials should be selected for children's backpacks to ensure their lifespan the safety of children's backpacks is crucial to making them safer at night or in low visibility environments the weight of children's backpacks should not be too heavy to avoid affecting their normal walking and movement.syi