Ergodyne - EGO16821 The N-Ferno Balaclava Face Mask is designed with high-quality, soft, stretchable fleece for warmth when working in the cold. Heat-trapping fleece is warm without being bulky and will fit comfortably under a hard hat or helmet. Soft fleece traps body heat for warmth when working in the cold. High-quality, thermal fleece promotes warmth in mild-to-extreme conditions. Long length adds extra coverage for your head and neck and can be tucked into your jacket to seal out the cold. Reflective accent on the back adds 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 face mask is perfect for construction, freight/baggage, drilling/mining, oil/gas refining, iron/steel work, delivery/service, landscaping/grounds, cold storage/warehousing and material handling.