Our ultra copper knee support contains 3 times more copper than others, to surround your knee with healing warmth. Copper helps warm muscles to relieve pain and stiffness. Knee compression wrap improves circulation to speed recovery. Flexible knee wrap design stabilizes joints and muscles while enhancing mobility. Slim profile fits under clothing and is ideal for men or women. Specify color. Specify size: Small, Medium or Large. Machine washable. 15% copper/22% rubber/63% cotton.