1. Using high-quality breathable spandex material, carefully processed and designed, with soft, comfortable, Elastic features.2.When wearing this chest brace, it helps to improve the problem of the seat back and restore the natural straightness of the beautiful back.3.High elasticity and comfortable shoulders are easy to wear.Nylon buckle design, adjustable to better fit your body.4.Stretch the cross belt backwards, stretch comprehensively, straighten the chest and back, suitable for the back to help the spine recover and improve the natural upright hunchback posture.5.Reduce shoulder and back pain, improve the hunchback shape and look good.6.Suitable for workers, teenagers and others have bad sitting and walking habits.Specifications: polyester + Leather + PVC Size: Free Size Color: Black Features: Health, Humpback Whale Correction