The Zoom Fly 6 is with you every step of your run. Lighter than the Zoom Fly 5, its responsive ZoomX foam adds energy return to each stride, while a carbon fiber Flyplate helps propel you to the finish line. Design: Redesigned upper with two-layer woven mesh system ensures sock-like comfort and ultimate breathability In-Shoe Comfort: Lightweight Nike(R) ZoomX foam provides energy return in every step Full-length carbon fiber plate increases efficiency and responsiveness Durability & Traction: Thin rubber outsole is lightweight and grippy on the road Additional Details: Heel-to-toe drop: 8 mm