Abrasion-resistant ripstop nylon for lightweight and breathable performance built with cement construction for flexibility Composite Safety Toe powered by CarbonShield technology polyurethane footbed for shock absorption and energy return TPU Wrapped Aerocore midsole delivers maximum energy return while resisting rips, abrasions and scuffs. Metal and mutilation free. Breathable and moisture-wicking lining Lightweight All Weather TPU outsole with anatomically positioned flex grooves, with fiberglass shank for structural support