PRODUCT DESCRIPTION Copper Fit compression sleeves can be worn anytime while participating in physical activity, moderate activity, or when completely at rest. They're great for daytime and nighttime. Copper Fit compression sleeves offer the highest quality comfort fit, making them ideal for extended wear. Many people benefit from wearing Copper Fit all day long, underneath their clothes. Remember that the benefits of wearing your compression sleeve can only be felt when they are worn and sized properly. Measure the inches around your knee. Medium: 13" - 14" Large: 14" - 16" X-Large: 16" - 18". Copper Fit was created to provide supportive relief and freedom of movement for any lifestyle and body type. Get energized and revitalized with compression that supports muscles during moderate levels of exertion, giving relief from everyday stiffness and soreness. The thin and comfortable design combined with moisture wicking technology allows you to wear Copper Fit under clothes during the day or even while you sleep. How does Copper Fit work The compression sleeves help reduce the recovery time of muscles and supports improved circulation and oxygenation of working muscles. Copper Fit provides support for muscle stiffness, soreness and pain. All Copper Fit products are made of high-quality performance fabrics with copper ions bound to the fibers level during manufacturing to reduce odor. Moisture wicking technology helps prevent chafing and rashes. Suitable for men and women of all ages. MANUFACTURER CONTACT INFORMATION Ideavillage Products Corp. 155 Route 46 West, 4th Floor Wayne, NJ 07470