Alphafly 3 Shoe Size:9 What's been updated: Updated with

What's been updated: Updated with recycled Coreloft™ insulation and DWR (Durable Water Repellent) free from intentionally added PFAS

while allowing the toes to move freely

plus the stable base you need for weights

This version has two straps featuring the modern and functional BIRKENSTOCK stealth buckle

Alphafly 3 Shoe Size:9 What's been updated: Updated withFine 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. Product Details: Energy Return for Your