Zero G: Built with super-lightweight materials keeping your feet at ease all day long Safegrip: strategically-designed sole tread pattern offers superior slip resistance and effective grip on slick surfaces. ActiveProtect: activated carbon insoles keep your feet smelling fresh. Soft full grain leather upper Breathable mesh lining Removable EVA cupsole combined with layers of memory foam wrapped in microsuede socklining Cement construction Lightweight EVA outsole combined w/ slip-resistant rubber pads