This comfortable sleeve offers supportive compression that helps promote circulation to ease inflammation and pain. It is infused with camphor and wintergreen that activates upon movement to aid in fast relief and better mobility. Great for men and women, the ventilated construction provides breathability so you can wear them all day long. This sleeve helps to stabilize your knee to help prevent muscle tears, ACL strains, arthritis, muscle and joint pain. The patented, washable design retains its medicinal properties up to 40 washes and can be worn on the left or right. Nylon and rubber. Unisex. Sold separately. Choose: S/M (13"-16") or L/XL (16"-19 (Measure circumference of your thigh 2" above your kneecap).