Look for bags made with light materials with lots of sides pockets to distribute weight evenly. Many extra side pockets are not necessary until maybe 3rd grader. Always check the backpack weight written on the labels before buying along with the capacity. The backpack should not be bulky by itself.
2. The size of the backpack:
The backpack should be ideally fitted according to the height of your kids. It should never be 4 inches below the waistline of your children.
3. Straps and Paddings:
The shoulder straps should be wide approximately (2 inches) and padded to take the weight. A hip strap or waist belt good options as it helps to distribute the weight evenly. Children's tends to resist in strapping around the hip. It should be strapped on the hip bone and not below the waist line.Breathable mesh for the Straps and padding are necessary for the air circulation. The shoulder strap needs to adjustable.
4. Ergonomically suitable
The ideal shape of the backpack is a broad base and slender as it reaches shoulders. Often an adjustable strap is there to squeeze the weight on the sides downwards.
Put the heavy books at the bottom then the files and lastly the stationery. Organisation of school bags is an important task that the child should be made aware. Try every two days in a week to organise the backpack by taking all things out. Make it into a habit. It is essential learning for your child simultaneously it also helps to reduce pile ups.
6. Lunchboxes and water bottles:
Should be lightweight and easy to carry.
8. Do not buy big backpacks than necessary for your kids.
The more the space, more is the temptation for the child to stuff in things than the required.
9. Wheels on the backpack: Wheels can be an option so that the backpack can be pulled. You have to check the weight of the wheeled bag and also consider the difficulty in climbing stairs
10. Awareness of the school: If necessary you can always consult your school class teacher about the heavy backpack and the steps that have to be taken to reduce it.