2-LAYER THERMAL LINER – Regular (chin) length design keeps head and ears warm and coveredOUTER SHELL – 100% cotton twill to stand up to tough environmentsWARM LINING – Soft 100% polyester fleeceLIGHTWEIGHT – Fits comfortably under a helmet or hard hat without feeling too bulkyELASTIC FIT – Elastic gather at forehead closes the gap between liner and forehead to keep the heat in and cold out