Heavily insulated with 600G of Thinsulate insulation, this all full-grain leather steel toe boot also offers ultimate waterproof protection and superior slip resistance in icy conditions through the use of the Vibram FIRE & ICE outsole made of a special rubber compound that will not harden in cold temperatures. Belleville Gore-Tex boots run about 1/2 size larger than your running shoe. For example, if you wear a size 10, consider trying a size 9.5. VANGUARD running shoe sole construction Steel toe meets ASTM F2412-11 and F2413-11 standards for impact & comprehension and EH rated Durably waterproof and highly breathable GORE-TEX fabric 600g THINSULATE Insulation Specifications Height: 8" (Standard Military Height) Upper: All 100% cattlehide leather Midsole: Highly cushioned, shock absorbent midsole Outsole: 100% VIBRAM 360 FIRE & ICE compound designed to improve traction in icy conditions Insole: Single density molded removable insert