OccuNomix Heavy Duty Winter Liners come in a variety of protection, lengths and materials.  All OccuNomix liners have two built in pockets which hold "HOT RODS" warming packs, short elastic strip to keep liner snug against the face, insulated ear barrier, and a reflective silver strip above the back of the head for working in low light areas.  Some of the OccuNomix FR Liners are made with 100% Cotton PROBAN® FR-7A.  Choice are shown below.