Fashion & Footwear › Running Shoes
Ultrafly 4
Model timeline
Lightweight cushioned running shoes
by Topo Athleticbrand #15 in Running ShoesMid-range · middle third of running shoes
Should you buy it??
Check closely
Buyersowners score outsole durability weakest — 2.1 / 5
based on 3 of 6 signals
Quick take
In short: what each side says
Buyers · Brand claims — each opened up in full further down ↓
Owners love the spacious toe box and cushioning that works well for all-day wear and foot pain relief, but the outsole's thin forefoot rubber wears through quickly and the sole stiffness change from e
The marketing is honest about the Ultrafly 4's spacious toe box and comfortable cushioning for daily wear, which owners strongly confirm. However, the claim that the shoe will "retain its bounce over longer distances" stretches reality—owners report the outsole's thin forefoot rubber wears through quickly, severely compromising durability and long-term performance.
The juries split — Check closely before you commit.
Main competitors
Top rivals in Running Shoes.
The verdict
What the panel makes of it.
The Ultrafly 4 ranks #20 for flat-foot running shoes and earns strong buyer satisfaction (4.1/5) for its spacious toe box and all-day cushioning, but the thin forefoot outsole wears quickly, undercutting claims of lasting durability at its $90–$135 price point.
Act one
What the machines think.
Several AI models read the category and place this product — model by model, list by list, over time.
Rank trajectory?
Weeks of movement.
Act two · ★ new
What the people say.
The same product, judged by the owners who bought and filmed it — what they praise, what they knock, who it's for.
What buyers say?
What Google knows about it.
Beyond the video critics, Google pools 80 buyer ratings of the Ultrafly 4 from across retailers — a far wider, if blunter, jury. Here’s the shape of that opinion.
80 ratings · 5 written
across 3 retailers
What owners single out
The outsole durability issue that buyers flag as a major weakness aligns with the thin rubber coverage and premature foam wear-through mentioned in reviews.
In their words
“Large toe box is awesome. Very comfortable. Using them for work as I am on my feet most of the day. Marathon Sports online was great to work with. No problems. Easy.”
verified purchase · marathonsports.com
“This is a nice shoe. I've had 2 pairs for road running. Comfortable shoe and runs. The outsole is horrible though. There is no rubber over the forefoot of the outsole. I have no idea what topo is thinking. Save money? Save weight? Current shoe is about 200 miles and the foam is worn through. Unfortunately there are no other stability road shoes. If they covered the full out sole with good rubber t”
Andrew · verified purchase · topoathletic.com
as of June 22 · 80 buyer ratings?
Claim check?
Promise vs. proof.
We lifted Topo Athletic’s headline product-page claims and checked each against what owners and expert reviewers actually report.
The marketing is honest about the Ultrafly 4's spacious toe box and comfortable cushioning for daily wear, which owners strongly confirm. However, the claim that the shoe will "retain its bounce over longer distances" stretches reality—owners report the outsole's thin forefoot rubber wears through quickly, severely compromising durability and long-term performance.
“light and nimble Ultrafly 4 will feel better when moving quickly and retain it's bounce over longer distances”
Outsole wears through quickly, poor durability
While owners confirm the shoe feels light and comfortable for daily wear with good cushioning, the outsole durability is critically poor (2.1/5), undermining the claim of retaining bounce over longer distances.
“This is a nice shoe. I've had 2 pairs for road running. Comfortable shoe and runs. The outsole is horrible though. There is no rubber over the forefoot of the outsole. I have no idea what topo is thinking. Save money? Sa”
OwnerAndrew
Toe Box Width“wide toe box found in the Ultrafly 4 and all Topo Athletic running shoes allows your toes and feet to spread more naturally”Holds up
Owners consistently praise the spacious toe box as a standout feature that allows natural foot spreading and provides excellent comfort.
“Large toe box is awesome. Very comfortable. Using them for work as I am on my feet most of the day. Marathon Sports online was great to work with. No problems. Easy.”
Ownermarathonsports.com
Alternatives by price · Same field?
Same money, different answer.
The recap
Where it stands today.
- MakerBy Topo Athletic — see how it ranks across other intents on its brand profile.