Features of the Carhartt Men's Rugged Flex 6 Inch Work Boot - Composite Toe Composite safety toe. Identifies protection against impact and compression hazards with a composite (non-metallic) safety toe. Composite toes meet ASTM F2413-18 standards Electrical hazard (safety toe). Identifies secondary protection against incidental contact with electrical circuits of 18,000 volts or less under dry conditions. Safety toe EH styles meet ASTM F2413-18 EH standards Rubber heel bumper. The rubber heel bumper feature is designed to provide extra abrasion resistant durability Fastdry Technology lining. Fastdry lining wicks away sweat for comfort Cushion comfort insole. Carhartt PU with foam cushion insole provides comfortable support and reduces foot fatigue EVA Midsole with PU strobel pad Cement constructed with carhartt rubber rugged flex Outsole