Nike Zoom GP Challenge 1 PRM (M) | Fromuth Racquet Sports。Synthetic and mesh material for lightweight support and easy ventilation. Rubber drag-guard on the medial side of the toe-box, and extra padding around the ankle collar for a plush feel. Intergrated lacing and lateral belt help with support and lock-down. Zoom Air units located under the forefoot and heel for easy energy return and a smooth ride. Stability plate helps to resist torsional twisting of the shoes. High abrasion rubber outsole in a herringbone design; rubber is more dense on the medial forefoot high wear region, and finer tread on the lateral side for sliding enhancement.