A critical piece of cold weather gear, the 509 Heavyweight Pro Balaclava cranks up warmth and windproof protection in a design that layers seamlessly under your 509 helmet and goggles. Breathable vent panels in strategic zones prevent fogging and overheating while the face mask can be pulled down around your chin when it's time for a pitstop. The moldable nose piece forms a perfect fit with your goggles and the added length stays tucked in for total coverage.