NIKE Men's 309434 Leather Fashion Sneaker Leather Rubber sole Leather upper with VELCRO brand fastener strap at midfoot for support and a secure fit. Phylon midsole with Air-Sole unit for superior cushioning and a comfortable ride. Rubber outsole for traction and durability. Flex grooves for enhanced flexibility and a smooth, efficient stride. Flex grooves for enhanced flexibility and a smooth, efficient stride.