The N-Ferno 6815 Hard Hat Tube Liner delivers warm, wind-blocking coverage for your face, ears and head, designed to layer comfortably under any hard hat or safety helmet for added protection in cold conditions. Made from stretchable polyester knit material, it provides all-day comfort with a snug, low-profile fit. Lightweight and breathable, the cap offers reliable warmth in mild to cold conditions. Easy to maintain, the liner is machine washable for added convenience. This win