1Back and waist double support, correct posture, support back and waist muscles. 2Provides strong back support and stabilizes the shoulders and back, effective correcting. 3Lightweight, breathable but strong washable fabric that can be worn in summer without feeling stuffy. 4Elastic shoulder support fits your shoulders well and does not cause armpit pain. 5Helps you improve muscle memory, keep your back straight, and help improve overall spinal healthy and posture.