Slip-resistant, non-marking rubber outsoles: ASTM F1677, Mark II in wet/dry conditions Seam-sealed construction with waterproof materials resists against water absorption Breathable upper mesh and leather combination enhances comfort in warm conditions Removable memory foam footbed provides lightweight impact absorption cushioning that forms to your foot Lightweight EVA midsole offers flexible, lightweight impact absorption RBar provides rear foot stability in EVA midsole