Sabastian Sawe's 1:59:30 in London on Sunday was an athlete's run before it was a shoe story, but Adidas's Adizero Adios Pro Evo 3 is now part of marathon history regardless. Sawe, Yomif Kejelcha and Tigst Assefa all wore the new edition, weighing a claimed 97 grams in a men's UK 9 — about 40 percent of the mass of an old-school racing flat — and Adidas's lab data, finally released to media on Monday, says the new shoe gives a 1.6 percent improvement in running economy compared with the Pro Evo 2 worn by Tigst Assefa to win Berlin in 2023. That number is small in isolation; in marathon terms, when stacked on top of carbon-fibre plates and PEBA foams that already deliver around four percent over a 1990s flat, it is enough to convert sub-2:01 fitness into a sub-two performance.
The mass cut is the headline. Three engineering decisions get the new shoe under 100 grams without compromising stack height, which World Athletics caps for road racing at 40 millimetres. The midsole has been reformulated with a new-generation Lightstrike Pro Evo foam that Adidas says is 50 percent lighter than the Pro Evo 2's foam at the same compression density, achieved by a different supercritical-nitrogen blowing process and by replacing some of the Pebax content with a lighter elastomer. The carbon plate has been redesigned around a single, asymmetric arch that uses 20 percent less material than the dual-rod plate of the Pro Evo 2. And the upper, the most visible departure, has been replaced with a single layer of woven thermoplastic film inspired by kitesurfing sails — a fabric Adidas's apparel division had been developing for water sports.
That upper is the science Adidas is most willing to talk about. Where standard racing uppers use a knit mesh that absorbs sweat and adds weight as the race progresses, the Adios Pro Evo 3's woven film weighs 11 grams per shoe at the start and 11 grams per shoe at the finish, with no measurable water absorption in lab testing at race pace. It is also more rigid, holding the foot over the plate without the dynamic stretch that knit uppers introduce — a property that Adidas's lab data suggests transfers more of the carbon plate's stored energy into forward motion. Reviewers who have run in the shoe note a foot-locked sensation that is unlike any previous super shoe, and the shoe's reputation among elite athletes for staying secure even in heavy rain — Sawe ran into a passing London shower at 35 kilometres on Sunday — has been a major selling point inside the elite marathon paddock.
The economy figure of 1.6 percent over the Pro Evo 2 is consistent with what independent biomechanists have begun to publish. A Loughborough University team running the Pro Evo 3 against the Nike Alphafly 3 and the Asics Metaspeed Sky Tokyo on its own treadmill protocol found a mean economy advantage for the Adidas of 1.4 percent over the next-best, though the spread between athletes was wider than for any super shoe the lab has previously tested. The team's lead author, Dr Ross Tucker, said in his Monday newsletter that the shoe "appears to suit a narrow but increasingly identifiable runner profile — light, fast cadence, mid-foot strikers — and may be neutral or worse for heavier runners running 80-minute half-marathon pace." That observation matches the elite marathon roll-call: every podium runner in the 1:59:30 race was under 60 kilograms.
The commercial story is just as striking. Adidas closed the Frankfurt session up 5.1 percent on Monday, adding around 2.1 billion euros of market capitalisation, with analyst notes from Citi and Berenberg citing the Adios Pro Evo 3 as the brand's strongest direct technology challenge to Nike's Vaporfly franchise since the original Pro Evo's launch in 2023. The shoe goes on general sale on 2 May at a recommended retail price of 500 dollars (or 500 euros in Europe), with each pair sold individually rather than as a pair to control resale and to reflect Adidas's stated 200-mile life expectancy. The next test is whether the science holds up at Berlin, Chicago and New York in the autumn — and whether the next batch of athletes, in shoes available to the public, can run anywhere near the times that Sawe, Kejelcha and Assefa produced on Sunday.