INCLUDE ONE PIECE. Fabric: OK cloth: this fabric has gluing effect and is suitable for sports protective equipment, medical protective equipment, horse protective equipment, etc. It is not easy to pilling, close to the skin, warm, strong and durable. Size: length about 57cm, width about 19.5cm About this product: 1: silicone anti-skid, shock absorption protection. 2: 4 spring supports: the metal spring can bend, making the knee more flexible and ensuring the supporting force of the knee pad. 3: A damping pad is added at the patella to effectively alleviate the impact of external forces. 4: The fabric has good air permeability. 5: Velcro fastener, easy to wear. EFFECTIVE RELIEF & SUPPORT Components such as patella gel pad, spring side stabilizers can significantly effective reduce the pressure of the knee joint and help the meniscus to recover. Wrap around the patella to enhance the stability of the kneecap and relax tendons, avoid pulling, prevent muscle strain. Relieve ACL, LCL, MCL, PCL pain, prevent ligament injury, fracture, dislocation and so on. It is Perfect for Pain Recovery or Workout.