Tanac Artificial Muscle Knee Supporter Size: L (Knee circumference/38-43cm, Thigh circumference (10cm above knee)/-50cm) Color: Red Made in Japan Warm fabric with moisture absorption and heat generation/moisture absorption and release Uses "Warfill" for comfort in both summer and winter. The uniquely formulated silicone with excellent elasticity Supports bending and straightening of the knee by conforming to movement. Recommended knee supporter for the elderly, sports, and running. Supporter