The N-Ferno 6952 Winter Hard Hat Liner features three layers of insulation, with a quilted shell, foam mid-layer and sherpa lining for enhanced warmth and comfort. This lightweight shoulder-length thermal liner is extra long to keep head, ears and neck covered while fitting comfortably under helmets or hard hats without bulk. The quick-drying polyester sherpa lining delivers all the benefits of real sheep’s wool to keep wearers warm without bulk or discomfort. Also features a quilted nylon shell and foam-insulated mid layer for added thermal protection. A hook & loop chin strap comfortably secures this winter liner, while four exterior hook & loop straps securely attach to hard hat suspensions for warmth on the jobsite. An elastic rim on the forehead keeps the liner snug to trap heat and keep cold out. This hard hat winter liner features small side pockets designed for storing hand warmers to keep ears warm in extreme cold. For even more thermal protection, this liner is compatible with N-Ferno Thermal Mouthpieces (sold separately). This winter liner is ideal for those requiring head protection while working in construction, freight, mining and more. Can also be worn under recreational helmets for weekend activities such as skiing, snowboarding or snowmobiling.