Ryka - N-Gage Instructor (Black/Black/Silver) - Women's: Forefoot Ryka Engage cushioning in a shoe designed for the frequent studio class participant. Superior cushioning, overall shock absorption and stability. Midcut synthetic and mesh upper provides lightweight, breathable support. Forefoot Ryka Engage provides superior cushioning with rebound. Midfoot TPU shank provides arch support and stability. Rearfoot cushioning cartridge provides durable cushioning, rebound and shock absorption. Removable, molded Nitracel sock liner gives added cushioning and comfort. Durable rubber outsole.