KEEN Utility Men's Overton Mid Carbon-Fiber Toe Boot Steel Grey/Black Versatile, throwback-inspired mid-height work shoe with energy-returning cushioning, lightweight safety features, and dependable traction for active workdays. KEEN.ReGEN. Carbon-Fiber Toe. Oil- And Slip-Resistant. Heat Resistant Outsole. EH-Rated KEEN Utility Men's Overton Mid Carbon-Fiber Toe Boot Steel Grey/Black