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. Full-Length Carbon Fiber Plate A slightly wider carbon fiber Flyplate gives you a propulsive and stable feel with each step and turn. Cushioned Ride Fully connected ZoomX foam creates an ultralight and cushioned feel, helping you stay fresh and comfortable from mile 1 to 26.2. Atomknit Upper The Atomknit upper offers lightweight containment and breathability. What's New? Lightest Alphafly yet Wider carbon fiber plate for increased stability Improved multidirectional containment and breathability Fully connected ZoomX foam midsole for smoother transitions Notched laces offer a secure but soft lace-up Integrated knit tongue with lofted padding helps alleviate lace pressure