Suitable for 31~45cm knee circumference; Applicable: slight patellar wear, patella softening, basketball, leaping knee knees, patellar bottom pain and all kinds of sports, etc.; Breathable; Comfortable to wear; Designed to improve patellar tracking and elevation; Provide pain relief from chondromalacia (irritated kneecap), patellar tendonitis and osgood-schlatter's disease