Thermo Reactive Technology: (Improved recovery time. Absorbs natural heat and reflects Far Infrared back to the skin, helping the body recover) Improved recovery time. Provides compression and support for weak or aching hands and wrists. One size fits most. (1) Helps in the treatment of painful conditions such as arthritis. (2) Helps reduce pain, stiffness and swelling in the hand. Sizing: One size fits most, fits left or right hand. Not made with natural rubber latex. Measure circumference of the wrist. Fits 6.7 - 8.2 inches (17.1 - 21.0 cm). Since 1959 the Mueller family has been the trusted leader in sports medicine. We are dedicated to creating the highest quality products that help people recover and perform at their peak. Trusted brand. Family owned since 1959. Engineered in Wisconsin by Mueller Sports Medicine.