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: Weight: Approx. 214 g/7.7 oz (Women's US 8) Heel-to-toe drop: 8 mm