The 509 Midweight Pro Balaclava is a clutch piece of warmth that gives you windproof protection against a wide range of weather conditions. Designed to be worn comfortably under your 509 helmet and goggles, it features stretch performance and contoured shaping that keeps you fully covered without bunching up or blocking vision. Breathable vent panels around the mouth prevent fogging, while the longer length around the neck stays tucked inside your jacket for total coverage.