Train light on your feet with added control. Exclusive RealFlex technology helps promote natural movement of the foot. Individual flex-friendly “nodes" are designed to help your feet move and flex as you work out. The RealFlex Transition adds reinforcements in the front and back to enhance stability through your workout. The single layer polyester mesh upper has a hotmelt appliqué to add strength with minimal weight. The thin micro suede tongue won't crowd your foot. The full collar lining and added heel counter add extra comfort that lasts throughout your workout, with a molded sock liner for cushioning.