⭐️Aoking Spinal Protection Ergonomic school bag specially designed for students⭐️- 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.- Backside suspension design, professional spine protectionSuspension technology provides no pressured space on the spine so that the spine is protected from object impact.- Strengthen the waterproof functionThe fabric is made of high-density lightweight waterproof fabric, which is light and strong, scratch-resistant, wear-resistant, and water-repellent- Thickened bottom plate at the bottom of the school bagPutting a lot of books will not cause the schoolbag to fall AOKING Upgraded Ergonomic Backpack School Bag Waterproof Lightweight Massage Shoulder Backpack (L Size)