Nike De3539 Chest Protector Four-layer, featherweight construction for uniquely high-performance Dual-density Energy Arrest Padding deadens ball rebound and bounce to keep blocked balls closer and easier to play Ultra-light diamond vent pattern padding layer designed to breathe and vent hot air, keeping you cool Control-Flex articulated design closely conforms to the chest for improved ball control and movement Ergonomic harness for a stable, comfortable fit