Get the weight onto your hips
A backpack with a real hip belt and load-lifter straps will do more for neck and shoulder pain than all the padded straps in the world.
Padded shoulder straps feel nice in the store, but they only spread pressure across the same sensitive area. The real trick is moving the load off your shoulders entirely. That’s what a hip belt does — it transfers most of the weight to your pelvis, which is built to carry it. If you’re hauling heavy textbooks every day, a hip belt isn’t a luxury, it’s the main event.
You also want load lifters: the little straps on top that pull the pack closer to your back. Those keep the weight from leaning backward and yanking on your neck. A chest strap helps too, by stopping the shoulder straps from sliding out toward your arms. And a frame, even an internal one, keeps the pack from sagging into a banana shape.
Fit matters just as much as features. The hip belt should sit on your hip bones, not your waist. The pack should be sized to your torso length, and the heavy books should go closest to your spine, not against the outer fabric. If the pack is too big or hangs
