The Core-Spun Gradient Compression Support Socks by Therafirm are designed for medical and mobility purposes. Made from a blend of polyester and nylon, these compression socks provide support with a 30-40mmHg compression level. The black color and machine washable feature make them practical and easy to use. Made in the United States, these socks offer a comfortable and supportive option for those in need of orthopedic support.