Goodyear Welt Construction. 600 Grams of 3M Thinsulate Insulation. Composite Toe is lighter than steel and fully meets ASTM standards for impact and compression resistance. PU Outsole. Rocky Airport Footbed. GORE-TEX Waterproof Construction. 9 inches in height. Netfit Construction. Full-grain leather and Cordura 2x2 basket weave.