⭐️Aoking Spinal Protection Ergonomic school bag specially designed for students⭐️Six vital functions(Weight-reducing, durable using, spine protection,etc.)--confidently guaranteed!- Backside suspension design, professional spine protectionSuspension technology provides no pressured space on the spine so that the spine is protected from object impact.- Massaged decompression shoulder strapsThe design of widening and thickening shoulder straps effectively solves the problem that the point of force on the back is concentrated while carrying weight. The slow pressure of the massage sponge can relieve shoulder pain and can also have a non-slip effect.- Chest buckle designFasten the chest buckle to disperse the force on the shoulders, distributing the weight of the backpack on the waist, and reducing the pressure on the shoulders- Breathable functionBreathable mesh back pad cushion, suspended and breathable, has better breathability, which is more comfortable, and not afraid of sweating in summer.- Strong and durableThere is a knot design inside the shoulder strap, which is very durable. The fabric is made of high-density lightweight waterproof fabric, which is light and strong, scratch-resistant, wear-resistant and water-repellent.- Waterproof zipper and rain curtain designZipper rain curtain design on the main compartment and waterproof zipper design on the second layer is to prevent rainwater from entering the backpack when it rains... AOKING Ergonomic Backpack School Bag Waterproof Lightweight Massage Shoulder Backpack Under Age 10