Ryka - N-Gage XT II (White/Oyster/Silver) - Women's: A versatile, stylish trainer ready to workout at a moments notice. N-Gage offers the ultimate in full foot cushioning. Circuit training, hip-hop weights, light treadmill; whatever your cross-training workout includes, this shoe is sure to perform. Synthetic/mesh upper. Forefoot and rearfoot Nitracel Engage Premium(tm) cushioning. Midfoot TPU shank piece. Upper strap closure to lock in laces and customize your fit. Molded, removable Nitracel sockliner. Durable rubber outsole.