Get a natural feeling run in a shoe with style that’ll have you turning heads on the track and trail. The single layer polyester mesh upper of the RealFlex Optimal is reinforced with a hotmelt appliqué for added lightweight stability. A slim micro suede tongue adds to the barely there natural feel. The full collar lining and added heel counter provide extra comfort throughout your run, with a molded sock liner for cushioning. Exclusive RealFlex technology helps promote natural movement of the foot. Individual flex-friendly “nodes" on the sole are designed to help your feet move and flex as you run.