éUPPER: Soft leather and synthetic overlays with a mesh collar for comfort. Reflective underlays for safety.MIDSOLE: Combination of PU and visible heel Air-Sole unit. Flexible and lightweight Phylon in the forefoot makes for responsive cushioning. Nike+ ready.OUTSOLE: Nike Rolling Rail for stable ride. Rubber forefoot exposes Phylon flex groove. DRC in heel for durability.For the walker seeking 360 degree comfort with great styling and versatility.é