Spine protector school bag

▸ Structural design: spine protection structure | Ergonomic back cushion system
▸ Material: waterproof polyester fabric + EPE anti-vibration plate
▸ Capacity/Weight: 20L | 0.75kg
▸ Safety configuration: 360° reflective warning strip
▸ Adjustment system: detachable chest buckle + 5cm adjustable shoulder strap