Designed for comfort and natural appearance. Spiral lift products are designed to provide firm and comfortable support. Strong and stable, yet fits easily. Reversible for right or left knee. The spiral design of this quality spiral lift knee support reaches out and embraces the weak and sore muscles above and below the knee supporting them like a firm, invisible knee. Not only does this product offer firm support, its design permits movement without slipping or rolling. It is easily reversible for left or right knee.