Weight
Doctors and TÜV experts recommend that a school bag with contents should not weigh more than 10 to 15 percent of your child's body weight. The empty weight should thus not exceed about 1.5 kilograms. After all, there are still books, notebooks, pencil case, lunch box and a water bottle.
Visibility and warning effect
.The satchel should have enough reflectors all around, so that your child is seen well on the way to school, even at dusk and in the dark. Bright signal colors also contribute to road safety. The DIN 58124 standard requires reflectors on at least 10 percent of the back and sides of the school bag. Ideally, at least 20 percent of the satchel also consists of fluorescent colors that shine brightly at dusk.
Fit
The back shape should fit the body and be well padded. A hip belt distributes the weight and relieves the spine. The satchel should not extend over your child's buttocks and should end at shoulder height. The ideal model is no wider than your child's back.
Design
It is not the most important criterion. But the appearance of the school bag should please your child. After all, he wears it every day of the week.