Backpack Guidlines 1. Don’t overpack. The pack should never weigh more than 15% of the child’s weight. 2. Wear both shoulder straps especially if pack is carried significant distance. Slinging the pack over one shoulder shifts all the weight to one side causing strain. Wear it over the stronger mid back muscles with both straps 3. Minimize the slack in the straps so the pack doesn’t dangle causing it to bounce and shift. 4. Newer designs use air in the straps. This provides excellent cushion. Call our office for a free consultation. 580.332.8200