101200 - M FR Hard Hat Liner Stay warm and protected in this hard hat liner. Made of 9-ounce, 100% cotton FR twill with an 11.7-ounce Polartec Power Stretch fabric lining. There are inside warming pouch pockets over the ears, and a lower front closure to keep out wind and protect the neck. Meets the performance requirements of NFPA 70E. Carhartt FR Hard Hat Liner