Lightweight, ergonomically designed dual-layer hard hat liner. Outer layer blocks out wind while inner Nordic fleece thermal layer keeps in heat. Features chin strap and hook-and-loop closure for attachment to internal hard hat system. FR-RWL20 has limited FR*. *The background material in this product is composed of treated polyester which will self-extinguish when exposed to flame. Self-extinguishing properties will diminish with washing. This garment does not provide protection against arc flash and should never be used where an arc flash or flash fire hazard is present.