(Professional's Choice) Get in and out of the saddle with no pain. The Miracle Knee Support encourages complete mobility at all levels of activity and reduces the effects of arthritis, damaged cartilage, sprains or strains. Flexible medial and lateral stays provide side-to-side support for ligament instability. Moist heat therapy helps increase blood circulation and relaxes tight or sore muscles. Made of neoprene. Worn comfortably over or underneath clothing.