Design: This design pays special tribute to Bill Bowerman, not only a Nike® immortal but a revolutionary giant in the running world at-large who turned jogging into a nation-wide phenomenon in the 60’s Unique touches throughout the design harken back to Bowerman’s beginnings as the proverbial godfather of a crusade made to get you moving Upper is more durable and breathable thanks to a single layer mesh Wider forefoot and base allows you plenty of space and a smooth ride Grooves in the forefoot to create flexibility, and vertical grooves down the side help create stability Molded heel securely hugs your foot Laces cinch down for a secure feel In-Shoe Comfort: Softened materials on the inside of the heel, collar, and the tongue feel smooth and comfortable Zoom Air unit in the forefoot offers responsive cushioning and energy return More Cushlon foam than previous Structures for better, longer lasting support with high foam stacks that help you stay healthy Shaped like a rocker, the foam provides support for the 3 phases of a runner's stride Durability & Traction: Durable rubber outsole is built for mileage