The Belleville Cold Weather 600g Thinsulate™ Steel Toe Boots in sage are heavily insulated with 600 grams of Thinsulate™, this all full-grain leather steel toe boot offers ultimate waterproof protection and superior slip resistance in icy conditions through the use of the Vibram 360° FIRE & ICE™ outsole made of a special rubber compound that will not harden in cold temperatures. FEATURES VANGUARD® running shoe sole construction Durably waterproof and highly breathable GORE-TEX® fabric 600g THINSULATE™ Insulation Military Compliant Steel toe meets ASTM F2412-11 and F2413-11 standards for impact & compression and EH rated