This Professional Knee Support Pad is made of high quality 68% nylon and 32% spandex material with 3D weaving technology and is soft, highly elastic, breathable, and won't roll, slide and slip down. It has 360 degrees sport protective and can prevent leg muscle strain. Protect the leg and knee from pulling in sports activity, reduce pain and recover faster from arthritis, swelling, tendonitis, meniscus tear, soreness, stiffness, ACL, PCL, MCL, and other knee pain. The adjustable strap can make adjustment according to personal knee curves. Easy to wear and take off and provides comfortable lasting support, and can be worn on either the right or left knee.