Ships from Hong Kong. Made of cotton, acrylic, latex silk and spandex, this knee sleeve offers sturdiness and stability to your knees with a snug fit and helps to reduce knee pain symptoms and swelling. It helps improve your performance with better muscle support and muscle efficiency, also improves blood circulation, ventilation and reduce the possibility of injury. Perfect for students' football, basketball, volleyball and dance or other sports. Dimension: One size fits most. Fit for knee width 30~40cm.