Alphafly 3 Shoe Size:13 Birko-Flor® is a skin-friendly

Birko-Flor® is a skin-friendly

The spacious main compartment has a mesh pocket

Enduro V-Tech Quarter socks are designed to mold around the contours of the foot for comfort through every activity

it unlocks even more energy return than before with a slight midsole reduction

This Core Tank is the staple piece you've been looking for to hold your wardrobe together

Alphafly 3 Shoe Size:13 Birko-Flor® is a skin-friendlyFine 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