Material:Nylon + Spandex SIZE CHART: S:suitable for leg circumference 37-43cm/14.5-17 inch; M:suitable for leg circumference 43-48cm/17-19 inch; L:suitable for leg circumference 48-53cm/19-21 inch; XL:suitable for leg circumference 53-58cm/21-23 inch; XXL:suitable for leg circumference 63-68cm/23-25 inch; Flexible Stabilizers --- Perfect Holding to Relieves Pressure and Reduces Stress. Beneficially effective to relieve acute and chronic knee pain from ACL, LCL, MCL, Meniscus Tear, Strains, Sprains, Arthritis, Tendonitis Pain and other injuries. Velcro Designed Strap --- knee patella support strap. It has velcro design straps that can be wrap around to any exterior part of the Knee Brace to firmly put it in place own choosing and feel the support thats best for you, thus making it more stable Patella Gel Pads --- Essential to help bend the knee with less stress and the patella gel pads to bring more comfortable movements in kneecaps even it protected with the other components of the product. Even with previous injuries or just went knee surgery, while wearing this, its as though you dont have it at all as it provides compression ease, comfort and healing from the said injuries. That being said, it is highly recommended for post-surgery recovery or preventing injuries from sports.