Built on single-width, anatomical fit last for more versatile, optimal fit. Asymmetrical composite safety toe powered by CarbonShieldTM technology. SD35 Electro Static Dissipative. Metal and mutilation free. All-weather TPU outsole with anatomically positioned flex grooves. Mark II oily wet #3 on American Olean tile at .40. TPU wrapped AerocoreTM midsole delivers maximum energy return while resisting rips abrasions and scuffs. Fiberglass shank for structural support. Anti-Fatigue Technology polyurethane footbed for shock absorption and energy return. Breathable and moisture-wicking lining with anti-microbial treatment for odor control. Cement construction for flexibility. 30-Day Comfort Guarantee. Imported