When it counts, either in the thick of a structural fire, wildland fire or medical emergency response, Thorogood engineering provides the durability for a long-lasting duty life and the components that allow safety professionals to concentrate on their jobs - protecting and serving the public. Upper: Black oil tanned logger leather, flame and cut-resisting. Lining: Dri-Lex tongue, comfort weave vamp. Removable felt footbed insole, rubber and leather midsole. Shank: Composite shank for totally non-heat conductive construction. Outsole: Thorogoodâs Vibram fire and ice sole. Special features: Kevlar thread and lace. Tip stitching for extra secure sole attachment. Meets the requirements of NFPA 1977 protective clothing and equipment for wildland fire fighting, 2011 Edition. UL Certified. Made in USA by ISO 9001 certified shoe company. Material: Leather, Rubber.