Ships from Hong Kong. Made of nylon, latex silk and rebound sponge material, 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 volleyball, football, rock climbing or dancing or other sports. Dimension: one size fits most. Fit for knee width 38~55cm.