Fine-tuned for marathon speed, the Alphafly 3 Premium powers your run with three innovative technologies. A double dose of Air Zoom units, a full-length carbon fiber plate and a heel-to-toe ZoomX foam midsole help propel you forward as you conquer your next race. Energy Return - Two forefoot Air Zoom units combine with ZoomX foam to store and return the energy back to you, powering every step with smoother transitions. Fire Underfoot - A full-length carbon fiber plate delivers a propulsive sensation and increased stability that helps you smoothly transition through every stride and tackle turns with confidence. Secure Fit - Notched laces offer a secure but soft lace-up. The integrated knit tongue with lofted padding helps alleviate lace pressure. What's New About the Alphafly 3? - Our lightest Alphafly ever features a slightly wider carbon fiber plate, a fully connected ZoomX foam midsole and an all-new Atomknit upper to improve multidirectional containment and breathability. [] Product Details - Weight - Approx. 218 g/7.7 oz (Men's US 10). Heel-to-toe drop - 8 mm. Not intended for use as Personal Protective Equipment (PPE).