N-Ferno 6863 Hard Hat Winter Liner, Insulated, Chin Length FIRE RESISTANT OUTER SHELL Modacrylic Cotton provides an outer shell with inherent flame resistance and self-extinguishing properties. INSULATED Foam insulation provides an additional layer of thermal protection for extreme cold environments WINTER HEADWEAR Thermal fleece lining and chin length design keeps head and ears warm and covered ADDITIONAL WARMTH Pockets at ears designed to hold warming packs for added warmth and comfort in extreme temperatures ELASTIC GAP CONTROL Closed gap control between liner and forehead keeps the heat in and cold out