Tennis elbow?We are proud of the results we have achieved with our elbow brace, particularly in regard to tennis elbow. It is also proving quite effective with tendonitis, an ailment which has become increasingly prevalent since the advent of personal computers.Ceramic fabric has a pronounced efficacy against pain caused by inflammation, and the elbow joint is a common site of such problems. In choosing an elbow brace, it is suggested to opt for a firm fitting size, as pressure is beneficial in recovery from this type of tendonitis.The elbow brace can also be effective on more chronic problems, even conditions requiring cortisone injections.Color - Black & Gray.Sizes: XS (less than 9), S (9 10), M (10 11), L (11 12), and XL (12 13). Machine washable up to 86F or 30C. Use normal detergents that do not contain bleach or fabric softeners. Air dry only, do not tumble dry. Back on Track products are not to be compared with magnetic therapy. The effectiveness of Back on Tracks thermal warmth therapy has been established by medical science.