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. Energy Return for Your Marathon - Two forefoot Air Zoom units combine with ZoomX foam to store and return the energy back to you, powering every step. Propulsive Feeling - A full-length carbon fiber plate delivers a propulsive sensation that helps you smoothly transition through every stride and tackle turns with confidence. Cushioned Ride - Fully connected ZoomX foam creates an ultralight and cushioned feel, helping you stay fresh and comfortable from mile 1 to 26.2. What's New About the Alphafly 3? - The Alphafly 3 is our lightest Alphafly ever, featuring a slightly wider carbon fiber plate for increased stability, a fully connected ZoomX foam midsole for smoother transitions, and an all-new Atomknit upper designed for improved multidirectional containment and breathability. More Benefits - Notched laces offer a secure but soft lace-up. Integrated knit tongue with lofted padding helps alleviate lace pressure. Product Details - Weight - Approx. 174g/6.1oz (Women's US 8). Heel-to-toe drop - 8mm.