Provides support to weak, injured, or arthritic ankle joints. One size fits most. Absorbs natural heat and reflects far infrared back to the skin, helping the body recover. Moisture. Air. Far infrared. (1) Thermo reactive technology. (2) Helps protect against ankle injury. (3) 360 degrees targeted compression. (4) Lightweight breathable material. Sizing sm/md fits left or right ankle U.S. Shoe sizes. Fits women's 6.0-10.0 / men’s 5.0-9.0. Not made with natural rubber latex. Engineered in Wisconsin by Mueller Sports Medicine. 3 in 1 (1) Reduces inversion-eversion motion in the ankle. (2) Supports ankle throughout workout. (3) Helps protect against ankle injury. Curt Mueller. 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. Class 1 medical device FSA Eligible.