McDavid's adjustable knee support provides overall stability and is designed specifically to reduce symptoms of patellar tendonitis (runner's/jumper's knee), Osgood-Schlatter disease and patella tracking. Equipped with movable padded buttresses for added compression and pain relief and adjustable hook and loop closure for custom fit. The latex-free neoprene provides thermal/compression therapy while the flat-seam construction gives you a comfortable fit. Fits left or right Knee. Fits Left or Right Knee Latex-Free Neoprene Movable Padded Buttresses Adjustable Closure Flat-Seam Construction Provides Overall Stability Sizing (Measurement around knee) S/M: 12-15 inches L/XL: 15-20 inches