Description:POSTURE IMPROVEMENT This posture orthosis trains your muscles and spine to return to their natural state of mind and reduce back pain caused by poor posture. Just training 2 hours a day, your straight posture and self-confidence makes improvement. Physically, hold your shoulder back. If you wear this collarbone only for 2 hours a day, you will get a good posture.POWERFUL BRACEintegrated design, light enough, but also with great pulling power for the shoulders.COMFORTABLE MATERIALMade from high quality, extra soft and breathable neoprene, it can even be worn comfortably under clothing so you can wear it all day without any problems.Specification:Material: NeopreneSize:S: 67-70 cmM: 77-80 cmL: 87-90 cmXL: 95-100 cm2XL: 102-105 cmPackage Included: 1 Back Braces, Lumbar Supports