The Arctic Sport Steel Toe is a professional extreme conditions work boot. It keeps you working at your best when mother nature is at her worst. - 100% Waterproof - Warm Fleece Lining - 2mm Thermal Foam Under Foot - EVA Midsole for Added Comfort - MS1 Molded Outsole - Steel Toe Shank - ASTM F2413-11 M I/75 C/75 EH - SKU ASP-STL-BL-070 Muck Arctic Sport Insulated Steel Toe Boot