NIKE Air Max 90 Mens Running Shoes Medium Grey/White-Black 325018-043 Leather and suede upper delivers ultra-comfortable, durable wear Maximum Air-Sole unit in heel with Phylon insert provides cushioning Torsional shank adds stability Nike Bareflex cushion pattern with BRS 1000 delivers durable traction Enhanced forefoot flex grooves integrate with the midsole for toe-off flexibility