Fine-tuned for marathon speed, the Alphafly 3 helps push you beyond what you thought possible. Three innovative technologies power your run: A double dose of Air Zoom units helps launch you into your next step; a full-length carbon fiber plate helps propel you forward with ease; and a heel-to-toe ZoomX foam midsole helps keep you fresh from start to 26.2. Time to leave your old personal records in the dust. Design: All-new Atomknit upper designed for improved multidirectional containment and breathability Full-length carbon fiber plate delivers a propulsive sensation Notched laces offer a secure but soft lace-up In-Shoe Comfort: Integrated knit tongue with lofted padding helps alleviate lace pressure Two forefoot Air Zoom units combine with ZoomX foam to store and return the energy back to you, powering every step Fully connected ZoomX foam creates an ultralight and cushioned feel, helping you stay fresh and comfortable from mile 1 to 26.2 Additional Details: Weight: 174g / 6.1 oz (Women's size 8) Heel-to-toe drop: 8mm