6882 Shoulder 2-layer Hard Hat Liner keeps workers warm in cold environments with its head and neck, flame-resistant coverage. Liner meets ASTM F1506 and NFPA 70E for ARC flash prevention. Made with two layers of insulation, 60 percent modacrylic and 40 percent cotton twill, this liner protects you from harsh conditions and flame-related injuries. Liner fits comfortably under hard hat without adding too much bulk. Hook-and-loop closure has a secure fit to prevent the cover from moving around during any task. Attach four exterior, hook-and-loop closures to the interior of a hard hat for extra security and warmth. Elastic strip on the forehead area keeps the liner snug against the face to trap body heat and keeps cold out. For extra face coverage, attach N-Ferno 6870, 6872 or 6874 mouth covers (not included).