The Sportwalker 4000 from Ryka is a comfortable well cushioned walking shoe that is great for a walking workout or everyday wear. Leather and mesh upper for lightweight breathable support. Midfoot TPU shank for arch support and stability. Enhanced forefoot flexibility complements a flexible walking gait. Rearfoot cushioning cartridge adds durable cushioning rebound and shock absorption. Removable molded Nitracel sockliner for added cushioning and comfort.