Product details:

Polycentric hinged bars with flexion and hyperextension stops, provide excellent support and medial-lateral (side to site) stability. Upper and lower hook-and-loop encircling straps maintain stabilizer in correct position straps are adjustable and removable. Opens flat for easy application over tender knees. Four-way stretch material provides even compression over all the anatomical prominences of the joint. Retains body heat and increases circulation, to help maintain flexibility. Breathable perforations in the material allow perspiration and moisture to escape for extended wearing comfort. For precisely targeted pressure over soft tissues, any combination of buttress quarter sections can be removed by using scissors to cut through the slits on the interior pocket. Opening over back of knee minimizes binding, provides for additional wearing comfort. Comes in Blue and Black options. Measure around the bend of the knee. Available Sizes X-Small (12-13 Inches), Small (13-14 Inches), Medium (14-15 Inches), Large (15-16 Inches), X-Large (16-17 Inches), 2X-Large (17-18 Inches), 3X-Large (18-19 Inches), 4X-Large (19-20 Inches), and 5X-Large (20-22 Inches).