Comment by 48snickers

I'm surprised they didn't compare the Vaporfly 4% to two other shoes: the Nike Zoom Fly and the Reebok Floatride Run Fast. The former is an identical shoe, but with the Pebax replaced with another foam (Lunarlon?). The latter is another Pebax foam shoe, but in a different form factor. That way they could tease out of it is the material or the shoe design.