Remington's artificial muscle supporter provides 360° support for the patella. This is a new, unused item, but it has been opened once for photography. Product Name: Artificial Muscle Supporter Knee Power Walk Features: 360° support around the patella Made in Japan Size: L, Knee circumference 37-40cm Please rest assured that this item was purchased from the Remington official website. Artificial Muscle Supporter Knee Power Walk Elastic silicone wraps around the knee 360° support around the patella Provides excellent knee stability