Style no. CMC1259. Take comfort in this Carhartt boot that is insulated in LiteFire, the thin lining is lightweight, breathable, waterproof and equal to 400 grams of insulation. This boot also includes a waterproof membrane and polyurethane midsole with Carhartt rubber outsole that is oil, chemical and slip resistant. OrthoLite insole and padded collar plus an OrthoLite comfort tongue for added comfort. ASTM 2413-11 EH rated.