Opens flat for easy application over injured, swollen or tender knees. Polycentric, aluminum hinged bars, with flexion and extension stops, provide excellent side-to-side stability. Four-way stretch material provides even compression over all the anatomical prominences of the joint. Upper and lower hook-and-loop encircling straps maintain stabilizer in correct position; straps are adjustable and removable. Opening over back of knee minimizes binding, provides for additional wearing comfort. Breathable and comfortable for long term wear. Convenient pull tabs to help put on and take off with ease. Low profile Velcro allows for a personal contour of the knee. Velcro does not get caught on other articles of clothing. Latex free.