KEEN Utility Men's Kenton Mid Carbon-Fiber Toe Boot Brindle/Gum Retro-inspired mid-height work shoe reinvented with lightweight safety features, active fit, and energy-returning comfort for tasklists that don�t quit. Carbon-Fiber Toe. KEEN.ReGEN. Oil- And Slip-Resistant. Heat Resistant Outsole. EH-Rated. Non-Metallic. KEEN Utility Men's Kenton Mid Carbon-Fiber Toe Boot Brindle/Gum