Ryka - N-Gage Walk (Silver/Sapphire) - Women's: Full foot Nitracel cushioning combines with midfoot shank to deliver stable performance for the serious fitness walker. Mesh/synthetic upper offers breathability and lightweight. Forefoot and heel Nitracel Engage(R) for superior forefoot cushioning and rebound throughout the walking gait. TPU shank provides light midfoot support and stability. Removable Nitracel sockliner adds cushioning and comfort. Shoe weighs 10.8 oz.