Midsole foam
We canât explore super shoes without discussing how they differ from average trainers. They generally weigh less because the midsoles are made with an ultra-light, high-performance foam called PEBA (short for polyether block amide)âreferred to by the brand name Pebax. You can put a carbon plate in an EVA or TPU midsole, but it wonât have the same benefits as the Pebax midsole of a super shoe.
For context, Hebert-Losier offers, âThe Nike Vaporfly 4%, the super shoe created for Eliud Kipchoge for his Breaking2 effort, weighed in at 210 grams. By standard, most menâs running shoes weigh 310-320 grams.â Thatâs a 32 to 35% reduction in weight, providing a nice advantage for an athlete.
But the real advantage is in the foam technology itself. The Vaporfly 4% earned its name because it offers an average four percent running economy, and zapatillas de running Saucony entrenamiento distancias cortas. Compared to EVA or TPU foams, Pebax is specially engineered to offer explosive energy return. This cushy midsole foam absorbs impact and fights fatigue with the intent to help you run faster and/or longer.
Imagine being able to cruise through a marathon in a shoe that makes it easier to add a little gas to the last miles when other athletes might be hitting the wall. With a benefit like that, youâd think everyone would want to run in super shoes.
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