But don’t worry, we’re here to help. Remember, choosing the backpack is only a small part of the equation: it’s all down to how you pack it, too, according to the British Chiropractic Association, which recommends a child’s school bag weigh no more than 10% of their body weight for a single strap bag, or 20% for a backpack.
Article source: https://www.huffingtonpost.co.uk/entry/best-school-backpacks_uk_6a6cc7a0e4b0c78215f84b44