SIZE CHART: S: leg circumference 37-43cm/14.5-17inch; M: leg circumference 43-48cm/17-19inch; L: leg circumference 48-53cm/19-21inch; XL: leg circumference 53-58cm/21-23inch; Take action and prevent knee pain before it occurs! Optimize joint and muscle performance while preventing injuries. The Knee Compression Sleeves are a great addition to your gym bag, as they provide extra support and protection needed to minimize risks and contribute to proper patella alignment. Made from an extremely elastic blend of nylon, spandex, and latex that contours to each knee offering support and compression where you need it most. Silicone lining ensures a non-slip grip. Decreased pain & swelling: Knee Compression Sleeves will help minimize pain and inflammation when there is a build-up of fluid in the joints from excessive pressure and stress. Theyre extremely beneficial when working out, as heavy lifting adds a significant amount of weight to your already stressed joints and muscles! Wear them post-workout to assist in recovery by regulating blood flow and maintaining muscle warmth. Decreased muscle fatigue: Stabilize your knees during physical activity! Repetitive impact against the knee while running or working out results in muscular vibration that fatigues the muscle, which will impact your performance. Wear the Knee Compression Sleeves to improve longevity during training and competitions! Increased blood circulation: Compression sleeves increase blood flow to and from the muscles, enabling adequate oxygen flow to the cells. During exercise, the body produces lactic acid, which accumulates in the muscles causing stiffness and decreased performance. Oxygenated cells will prevent this build-up by removing the lactic acid from the muscle, improving overall performance and recovery! Sold in pairs: Hit the gym or the track and keep your knees safe and supported with the Knee Compression Sleeves! Sold in pairs for complete protection in both knees. Available in 4 sizes for a personalized fit (S/M/L/XL) Measure the circumference of your thigh 4 above the knee cap to find out your size. Size down if you prefer a stronger degree of compression.