One Small Step Made from at least 20% recycled materials by weight, no detail is overlooked. From the Swoosh to the Nike Grind outsole, the design is one small part of Nike's commitment to help protect the future of sport. Legendary Look Featuring the original's ripple design that was inspired by Japanese bullet trains and the revolutionary full-length Nike Air unit that shook up the running world, it brings you a flash of the past with tried-and-true comfort. Originally designed for performance running, the full-length Max Air unit adds soft, lasting comfort. Foam midsole feels springy. Rubber outsole adds traction and durability. Fused mudguard adds durability and creates a sleek, integrated look.