Vaporfly 4 Infant The soft and flexible material

The soft and flexible material of the HammerRx provides you with a natural feel with every step

With its increased stack height and improved cushioning

Great for plantar fasciitis and pronation

and a flexible

From mock neck to nifty thumbholes

Vaporfly 4 Infant The soft and flexible materialThe Vaporfly 4 is a mile eating machine that just got lighter. We trimmed weight all over from the previous iteration without sacrificing performance. And the carbon fiber Flyplate and ultra responsive ZoomX foam midsole combine to give you race day speed. The result is a more fine tuned racing shoe thats trusted from the mile to the marathon