Everyday natural flexibility. The nike free 5.0 running shoe combines a highly flexible low-profile outsole for natural movement & the cushioning traction & lightweight support of an old-fashioned running shoe. Everyday flexibility new hexagonal flex grooves are hot-knife cut into the outsole & covering around the sidewall allowing your foot to move more naturally in every direction. Support & breathability the lightweight knit mesh upper is strengthened with flywire on the midfoot for lightweight ventilation & an adaptive supportive fit that moves with you. Natural stride the heel mimics the form of your foot rolling with the ground to promote a more natural footstrike.