The N-Ferno® 6840 Winter Hard Hat Liner has 2 layers of insulation with a polyester shell and a soft polyester fleece lining for exceptional warmth. This lightweight thermal liner is chin-length to keep head and ears covered and fits comfortably under helmets or hard hats without feeling too bulky. The PU coated 100% polyester outer shell is water-resistant and provides a durable finish that resists corrosion and abrasion. The 100% polyester fleece lining is soft to the touch for comfortable all-day wear. A hook & loop chin strap comfortably secures this winter liner, while four exterior hook & loop straps attach to the interior of a hard hat for a secure attachment and added warmth in extreme work environments. This hard hat winter liner has an elastic strip on the forehead area to keep the liner snug against the face to trap body heat and keep cold out. Great cold weather work gear for people who spend extended periods of time in cold environments and need to wear head protection, like those in construction, freight, drilling or mining, delivery service, landscaping, and warehousing. Also great for recreational use like skiing, snowboarding, sledding or other winter activities that may need a helmet. N-Ferno® Winter Hard Hat Liner, Regular-Length, Series: 6840, Polyester Shell/Polyester Fleece Lining, PU Coated, Black