The N-Ferno 6970 Extreme Balaclava with Hot Rox is a technologically advanced high-performance cold weather mask to combat the damaging effects of breathing in cold air. Warm 320g fleece covers the face, neck and head, while controlling moisture to keep you dry and warm. The built-in, removable heat exchanger warms the air before it gets to your face for easier breathing in extreme cold. The adjustable nose clip prevents eyewear from fogging, and the adjustable face mask is removable