The Mueller Sports Medicine Adjustable Posture Corrector is a one-size-fits-most device designed to provide posture support for both men and women. Made of lightweight and breathable cotton material, this black posture corrector is adjustable and suitable for the shoulder and back areas. It is a Class 1 Medical Device that is FSA eligible, making it a practical and effective solution for improving posture while engaging in sports or everyday activities. The adjustable design and quality construction from Mueller Sports Medicine ensure that you receive the support you need for optimal spinal alignment.