Men's Nike Alphafly 3 Vest - Reflective Swoosh at the

- Reflective Swoosh at the left leg and reflective bars

- Wrist based heart rate

35% Elastane

Automatically turns itself on and off

Works year-round – so you can wear it in any weather

Men's Nike Alphafly 3 Vest - Reflective Swoosh at theNike Alphafly 3 Men's Road Racing Shoes 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.