Asics FF Leap foam

What Is FF Leap?

A single reviewer's account frames FF Leap as a genuine shift in Asics's racing chemistry: a new ATPU-based foam debuting in 2025 across the Meta Speed Tokyo series, with the Meta Speed Ray built as a full FF Leap midsole. According to this reviewer, Asics is marketing the foam as 15% lighter, 14% more responsive, and 30% softer than its prior racing foam, FF Turbo Plus. That's a big claimed jump, and buyers should treat it as Asics's own positioning rather than an independently confirmed spec, since it comes from one reviewer relaying the brand's talking points.

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Turning to actual ride feel, this same reviewer describes FF Leap as very soft, highly dynamic, and resilient, with a strong sense of energy return underfoot. But the review also flags a trade-off: in a full-FF-Leap build like the Meta Speed Ray, that softness and bounce can tip into instability for some runners. So the takeaway isn't unambiguous praise — it's a foam that rewards runners chasing maximum bounce but may feel less secure to those who want a more planted platform.

The reviewer finds FF Leap to be very soft

The reviewer also addresses two of the bigger open questions around foams like this: durability and competitive standing. On durability, the claim is that ATPU foams such as FF Leap aim to match PEBA-level energy return while lasting longer, both in resisting abrasion and in holding onto their performance over repeated wear — a potential fix for a weak spot that has dogged Asics's softer foams in the past. On competitive standing, the same reviewer goes further, judging that FF Leap finally puts Asics's racing foam on par with what Nike and Adidas offer, and calling the Meta Speed Ray the high point of Asics's racing lineup to date. Both points are worth taking as one reviewer's assessment rather than an industry-wide verdict.

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Looking ahead, the reviewer speculates — explicitly as speculation — that FF Leap won't stay confined to one shoe. The expectation is that it will spread into a Superblast 3 built primarily around the foam, a Magic Speed 5 using it in the forefoot, and eventual next-generation Meta Speed models that go all-FF-Leap. That same reviewer also finds it curious that Asics paired the newer FF Leap with the older FF Turbo Plus in the Meta Speed Tokyo Sky and Edge, guessing this was a deliberate move to let the flagship Meta Speed Ray stand apart and to add some stability to the lower-tier models. Further out, there's a passing thought that FF Leap's properties might even suit an energy-ring midsole design, similar to ideas floated for FF Turbo Squared. None of this is confirmed roadmap — it's one reviewer's forward-looking read.

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What This Means for Buyers

Taken together, this is a single, detailed reviewer's take on a brand-new foam technology, not a cross-reviewer consensus. If you're drawn to a soft, highly responsive racing ride and are comfortable with the possibility of reduced stability at the extreme (full-FF-Leap) end of the lineup, the Meta Speed Ray is presented as the shoe to watch. Buyers more cautious about unproven durability or stability claims may want to wait for broader testing before treating FF Leap as a settled upgrade, especially given that the lighter, more responsive, more durable narrative currently rests on one reviewer's account of Asics's own claims plus early impressions.

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