The Georgia Boot Men's Carbo-Tec FLX 11" Patriotic Pull-On Work Boots attach the EVA midsole, extra-wide fiberglass Shovel Shank XL, and rubber outsole to the upper through flexible cement construction. The Carbo-Tec outsole is oil- and slip-resistant with great abrasion, chemical, and heat resistant properties, meeting ASTM F2892 electrical hazard standards.