One Small Step Made from at least 20% recycled materials by weight, no details is overlooked. From 100% recycled polyester pull tabs to the 40% recycled polyester Swoosh and 5% regrind 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. Crater foam midsole feels springy. Rubber outsole features some regrind and adds traction and durability. Fused mudguard adds durability and creates a sleek, integrated look.