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 320 g 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 with hook-and-loop attachments. Reflective accents offer visibility at night or in low-light conditions. One size fits most and can be worn alone or under hard hats, ski helmets or other head protection. This winter face mask is perfect for those who work in construction, freight/baggage, drilling/mining, oil/gas refining, iron/steel, delivery/service, landscaping/grounds, warehousing, and working in refrigerated areas.