1. Thin and lightweight material that is breathable and sweat-absorbent for comfortable all-day wear. 2. With hook and loop, it can be adjusted to better fit your body. 3. Forming the correct sitting posture and protecting eyesight and myopia. 4. Forcing the shoulder to fully extend it. 5. Reduce shoulder and waist pain and improve humpback to form a beautiful figure. 6. Suitable for workers, teenagers and other people with poor walking habits sitting down.