Nike Flex Run - Men'sFlexible lightweight comfort is the best way to describe the Nike Flex Run running shoe. No-sew construction in the forefoot reduces layering and enhances flexibility along with midfoot panel for great lockdown. Soft Phylon™ midsole gives great cushioning right where you need it. Articulated Phylite™ provides flexible lightweight cushioning with great durability. Removable insole. Wt. 8.4 oz.