Designed for use during sports or physical activities and helps support sore, weak, injured or arthritic knees. Patella buttress support reduces patella movement and provides targeted patellar tendon compression. Cross straps provide adjustment to movement for maximum support. Nylon inner lining for increased comfort. PU foam core promotes breathability. The perforated spandex outer liner provides additional ventilation of the brace. Lightweight, soft and breathable spandex and nylon material allow for all day comfort. Flexible steel springs helps support both sides of knees.