The Copper Fit Knee Stabilizer Sleeve features a circular knit compression sleeve that combines flexible side stabilizers with a protective gel patella ring for enhanced comfort cushioning. Provides enhanced support while maintaining range of motion. Designed to help provide comfortable movement when bending. Flexible, side stabilizers designed to increase compression support. Non-slip grips and high elastic fabric help prevent slipping. Copper-Infused to reduce odors. Make Sure to Order the Right Size - S/M: 12"-16"; L/XL: 16"-20" (measure the circumference of your left or right knee cap in a standing position)