Inspired by high performance, Z-rated tires, Reebok ZQuick TR aerobic & fitness shoes deliver superior handling and liveliness. Sports car-inspired Z-series foam is combined with high abrasion rubber for quicker stops and lasting agility. The top of the shoes is covered with the NanoWeb system that provides a dynamic look and incredible support.Upper: Mesh upper offers breathability and flexibility. NanoWeb system provides support. Low-cut provides added mobility. Flat laces reduce irritation and pressure points. Comes with an extra set of laces.Midsole: Midsole features iconic medial and lateral midsole cradle with lightweight flexible cushioning for comfort. BioSleeve system provides support. OrthoLite sockliner provides cushioning that accommodates orthotics.Outsole: Metasplit Flex Grooves allow foot to splay naturally while vertical and horizontal flex grooves allow for great all-around flexibility. Outsole rubber in high-wear areas give lightweight durability.