Z7 Men&#39;s Breathe Oxford,Black,10 M US,Z7,Breathe" /> 100% Waterproof leather Rubber sole Footwear engages all 26 foot bones and 7 major lower body muscle groups Z7 Cradle allows foot and body to move naturally as nature intended Outsole design improves balance- burns calories with health benefits PreciseFit adjustable foot bed allow for a perfect fit - Air-Eeze ventilation in each foot bed Leather upper seam sealed - waterproof - breathable construction