Design and Function Flame resistant hard hat liner fits underneath your hard hat without added bulk Breathable FR fabric drapes around neck and ears for protection from the sun Designed to fit most hard hats designs from multiple manufacturers Quality Manufactured in Santa Ana California for linemen and utility oilfield construction and refinery workers by Benchmark FR Safety CATHRC 2 EBT9 calcmsq Meets the requirements of performance specification ASTM F1507 Material Lightweight soft flexible skin safe FR Cotton Laundry and Care Machine wash cold with like colors Tumble dry low Do not use bleach