Mens Nike Alphafly 3 Thundercross the Metcon 9 gives you

the Metcon 9 gives you the support needed to get the work done

to give you propulsive energy and a springy feel

A rolled collar reinforced with foam ensures extra comfort and secure fit

Glycine & Tryptophan support

A classic sock height that hits the mid-point of your lower leg

Mens Nike Alphafly 3 Thundercross the Metcon 9 gives youMeet the latest Alphafly 3 the third gen game changer that flipped the script on marathon racing. It's dialed in for marathon speed, ready to take you places you never imagined. Three killer techs are on your side:? two air zoom units rocketing you into your next move, a full length carbon fiber plate propelling you forward, and heel to toe ZoomX foam for a much smoother transition. Soft and stretchy, supporting you multi directionally and is more