An unreleased Nike super shoe believed to be a Vaporfly 5 prototype has been spotted twice in the past week, first at a local 5K and then on Reddit, and its high forefoot and scooped-out heel have runners asking who the shoe is actually for.
The first sighting came in an Instagram video showing a runner lined up at a community 5K in all-white racers with an oversized black Swoosh and a silhouette unlike anything in Nike’s current lineup. “When you pull up to a local 5k and someone has the Vapor Fly 5 prototype so the saxophones keep getting louder,” the caption read.
Days later, new photos were posted to r/RunningShoeGeeks under the title “Another peek at the Vaporfly 5 prototype.”
“Quite an interesting look, tape on the heel,” the poster wrote. “Maybe we’ll be seeing more of these soon.”
Nike has confirmed nothing, including the name. The Vaporfly 5 label comes from shoe watchers, not the company.
What The Photos Show
The prototype carries a thick slab of foam under the forefoot while the heel is dramatically sculpted away, a far more aggressive geometry than any Vaporfly to date.
Commenters also spotted what appears to be an exposed section of the plate along the midsole sidewall, drawing comparisons to the Puma Fast-R and the Hoka Cielo X1 2.0, which leave portions of their plates visible rather than encasing them in foam. Tape covering the heel suggests Nike is concealing details it is not ready to show.
“Interesting carbon plate, also the heel is taped up?” one commenter wrote. The thread’s top comment was more direct: “Sorry midfoot strikers.”
A Shape That Picks A Side
Committing that much stack to the forefoot implies a racer built for runners who land there, and that is a minority. A 2018 World Athletics biomechanics study of the 2017 World Championships found more than half of the marathoners heel struck for at least part of the race, and the share is higher among everyday runners.
Every Vaporfly so far has worked across foot strike patterns. This design, if it survives to production, would be a departure.
Where The Vaporfly Line Stands
The current Vaporfly 4 launched in March 2025 at $260 as the lightest Vaporfly ever made, about 5.9 ounces (167 grams) in a men’s size 9 and roughly 10% lighter than the Vaporfly 3. Nike pitched it as its most versatile racer, suited to everything from the 5K to the marathon.
It has since settled into a quieter role. As Marathon Handbook’s Alex Cyr wrote in April, the Vaporfly 4 is “a safe racing shoe made more for comfort and durability than top-end speed,” while rivals like Puma, Adidas, and Asics have pushed harder at the front of the carbon plate market.
Nike does have precedent for testing radical prototypes in public. Its presumed Alphafly 4 raced for months under the name “Development Shoe 164” before anyone said the words out loud, and prototypes regularly feature in our super shoe power rankings conversations long before release.
World Athletics requires brands to declare any super shoe before it is worn in a sanctioned race, and that list is public. If this shoe is headed for a start line that counts, it will show up there first. For now, the confirmed sightings amount to one Reddit thread and one local 5K.
