More Air, less bulk. The Dn8 takes our Dynamic Air system and condenses it into a sleek, low-profile package. Powered by eight pressurised Air tubes, it gives you a responsive sensation with every step. Enter an unreal experience of movement. Unreal cushioning: Our Dynamic Air system features dual-chambered tubes with tuned pressure levels. This means airflow shifts within each set of tubes in response to compression, providing a custom cushioning experience. Product Details: Foam midsole. Rubber outsole More Benefits: The plastic heel clip helps hold your foot down for added containment. The extra layer across the toe tip adds durability.