Georgia Arctic Grip Waterproof Insulated Work Boot features blended merino wool lining to absorb moisture and remain warm, even when wet. Insulation zones with a whopping 1000g of ultra-thin, synthetic 3M Thinsulate Ultra provide warmth without bulk, even in the tongue where heat loss often occurs. For added warmth, this work boot has Arctic Toe technology that wraps full amounts Thinsulate insulation around the toe area without compressing it. This allows the toes to stay just as warm as the rest of the foot. Georgia Boot's Waterproof System keeps feet dry.