Why Should Children Use Knapsack Schoolbags?

The bone of children are soft and contain less calcium than those of adults, so they easily become deformed. If children use the schoolbags with a strap carried on one shoulder, the growth of the bones may be deformed. The shoulders may be uneven and the spinal column may be crooked. If children use knapsack schoolbags, the shoulders have the same pressure. So the not become deformed and the spinal column will not be crooked. In addition, when children carry the knapsacks they can straighten their backs and allow both arms to move freely. And the eyes can look straight forward. So all these are good for the children's health. ，