CAREFREE COMFORT: The light weight Nike women's running shoes have a soft knit material that conforms to your every step and encourages an adaptive ride that is ready wherever your route takes you. NATURAL FLEXIBILITY: The women's shoes are designed to fit your unique foot. The flex grooves in the outsole provide a natural flexibility and comfort that lasts. KNIT FABRIC: These sneakers for women have a soft mesh in the heel that gives you cushioned comfort while the knit fabric conforms to your foot for a snug feel.