Allbirds Tree Runner Go Review

Feather-light and breathable, with modest cushioning

The Allbirds Tree Runner Go is the newer, lighter member of the Tree Runner family. Allbirds launched it in April 2024 at $120, alongside a shift back towards the simple everyday sneakers the brand became known for, after a period of trying to make performance running shoes.

What separates it from the original Tree Runner is flexibility and weight. The Go uses a flat-knit upper rather than the original’s slightly denser one, and Allbirds thinned out the construction, so the shoe bends more easily and feels lighter on the foot. Everything else that makes an Allbirds an Allbirds carries over.

That includes the materials story, which is a genuine part of the appeal. The upper is half TENCEL lyocell, a fibre made from eucalyptus wood pulp, and half recycled polyester. The midsole is SweetFoam, Allbirds’ EVA foam made partly from sugarcane. Whether that matters to you is personal, but it is not marketing dressing: it is what the shoe is actually built from.

Specs

Here are the specifications for the Allbirds Tree Runner Go:

Pros

Here is what the Tree Runner Go does better than most:

• The eucalyptus knit genuinely breathes. In hot weather it feels cool in a way that ordinary synthetic mesh does not, and it handles bare feet without getting unpleasant.
• Very light. It is the sort of shoe you forget you are wearing, and it packs flat in a bag.
• Flexible from the first wear. There is no break-in and no stiffness anywhere.
• Machine washable, which is unusual and genuinely useful for a shoe worn without socks.
• Simple to look at. It works with shorts, jeans or a summer dress without shouting.
• Made from FSC-certified wood fibre, recycled polyester and sugarcane-based foam, if the materials matter to you.

Cons

And here is where it disappoints:

• Not much cushioning. The SweetFoam layer is thin by modern standards, so hard surfaces come through.
• Almost no arch support. The insole is flat and soft, and there is nothing holding the middle of your foot.
• The fit runs snug. If you are between sizes, going up is the usual advice, which is the opposite of most knit shoes.
• The pale foam soles pick up dirt quickly and stay looking grubby even after washing.
• The SweetFoam outsole is not durable rubber, so it wears faster on abrasive pavement.
• Grip on wet surfaces is limited. The tread is shallow and the material is foam rather than rubber.

What is new compared with the original Tree Runner

The Go is a lighter, more flexible reworking of the shoe that made Allbirds famous. The original Tree Runner uses the same eucalyptus-based knit but in a denser, more structured form, and it holds its shape more firmly around the foot. The Go loosens all of that off.

In practice that means three differences you will actually notice. The Go bends more easily, so it feels less like a shoe and more like a slipper with a sole. It weighs less, which matters on a hot day and in a suitcase. And it breathes better, because the knit is more open, which is the single biggest reason to choose it over the original for summer.

What you give up is structure. The original Tree Runner holds a slightly better shape over months of wear and supports the foot marginally more. Neither shoe is supportive in any meaningful sense, but if you found the original too soft, the Go will not fix that. It goes further in the same direction.

Who should buy the Allbirds Tree Runner Go

Buy it if you want a warm-weather everyday shoe you can wear without socks. This is what the Go is best at and it is a real strength. The knit is soft against bare skin, it does not trap heat, and the whole shoe goes in the washing machine when it needs it. Very few sneakers can honestly claim that.

It may also be for you if you travel light. It weighs almost nothing, it squashes flat, and it is smart enough to wear to dinner without looking like gym kit. As a second pair in a carry-on it is close to ideal.

And go it if you like a soft, flexible, low-slung shoe. Some people find modern cushioned trainers stiff and disconnected. If that is you, the Go’s simplicity is a feature rather than a compromise, and the flexibility is genuinely pleasant to walk in over short distances.

Who should probably skip it

Skip it if your feet need support. There is very little here: a flat insole, a thin midsole and a knit upper that holds nothing in place. If your arches ache, if you have been told you overpronate, or if you have any history of heel pain, this shoe will not help and may make a long day harder. Persistent foot pain deserves a proper assessment rather than a shoe purchase.

Skip it too if you walk long distances or spend your day on concrete. The cushioning simply is not deep enough, and a light shoe stops feeling light once your feet are sore. Those readers will do better with:

• Brooks Ghost Max 3: deep, forgiving cushioning and a rocker sole that carries you through each step, which is everything the Go lacks (check price | read review)
• Skechers Arch Fit 2.0: a contoured insole that actually shapes to the arch, at a lower price than the Allbirds (check price | read review)
• Brooks Addiction Walker 2: the structured leather option for feet that roll inward and need real holding on hard floors (check price | read review)

More running shoe options in our guide: Best Running Shoes.

How does the Allbirds Tree Runner Go fit?

The Tree Runner Go fits snugly, and it fits like a sock rather than a shoe. The knit wraps close to the foot with almost no internal structure, so it takes the shape of whatever is inside it. That is comfortable for most feet and unhelpful for anyone who needs a shoe to hold them.

Fit and sizing

The Go runs snug, so size up if you fall between sizes. That is the opposite of the usual advice for a knit shoe and it catches people out. Allbirds offers full and half sizes across both the men’s and women’s ranges, which gives you more room to get it right than the original Tree Runner did in its early years.

There is one width only. The knit stretches, so a broad forefoot is accommodated better than the single width suggests, but a genuinely wide foot will feel the sides pressing. Worth ordering with a returns plan in mind rather than assuming it will give.

Upper and step-in comfort

This is the best thing about the shoe. The flat knit is soft, slightly stretchy and pleasant against bare skin, with no seams to rub and no stiff heel counter pressing on your Achilles. You put it on and it disappears, which is exactly what you want from a summer shoe.

Breathability is genuinely better than a standard mesh upper. Lyocell moves moisture away from the skin, which is why the shoe stays comfortable barefoot on a hot day rather than becoming clammy. The flip side is that an open knit lets water straight in, so this is a dry-weather shoe.

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How does the Allbirds Tree Runner Go perform?

Set against what it is for, the Go performs well. It is a light, flexible, breathable shoe for ordinary days, and it does that job with very little fuss. It is when you ask it to protect your feet over distance or on rough ground that its thinness starts to show.

Cushioning and feel underfoot

SweetFoam is Allbirds’ EVA midsole foam, made partly from sugarcane rather than petroleum. As a cushioning material it behaves like a good EVA: soft on first contact, quite springy, and not especially deep. In the Go it is used sparingly, so you sit low to the ground and feel the pavement through it.

Whether that is a problem depends entirely on what you are doing. Walking to a shop, standing at a barbecue, wandering round a market: comfortable and pleasantly connected to the ground. Two hours on city pavements: your feet will tell you the foam ran out. It is a shallow shoe by modern standards and there is no getting round that.

Ride and everyday performance

The Go is flexible from front to back, which means the shoe bends where your foot bends. That feels natural and easy at walking pace and it makes the shoe pleasant to potter about in. There is no rocker shape, the curved sole design that rolls you forward through each step, so nothing helps you along. You do all the work, which is fine over short distances.

The name says Runner, and it is fair to be blunt: this is not a running shoe. Allbirds tried building performance running shoes and moved away from it, and the Tree Runner Go is squarely a lifestyle sneaker. A light jog will not hurt it. Regular running would be an unkind thing to do to your legs.

Stability and support

There is essentially none, and that is a design choice rather than an oversight. No medial post, which is the firmer wedge a stability shoe uses to slow the foot rolling inward. No structured heel counter. No arch shaping worth the name. The insole is a flat piece of soft foam.

What the shoe does have going for it is a low stack height. Sitting close to the ground makes any shoe harder to roll an ankle in, so the Go feels secure at walking pace despite offering nothing structural. That is not the same as support, and it will not change how your foot moves, because no shoe corrects gait. If you know you need support, this shoe cannot provide it.

Outsole, grip and durability

The outsole is SweetFoam with a shallow pattern moulded into it rather than a separate rubber layer. On dry pavement and indoor floors that is adequate. On wet pavement it is merely acceptable, and on wet grass or gravel it is poor. Foam does not grip the way rubber does.

Durability is the honest weak point. Exposed foam wears faster than rubber, particularly on abrasive concrete, so the sole is what gives out first. The pale colourways also grey and scuff quickly, and while machine washing helps the upper, it does not restore a scuffed sole. Buy this expecting a couple of seasons of regular wear rather than years.

Is the Allbirds Tree Runner Go good for walking?

For everyday walking, yes, within a sensible range. Errands, a stroll round a park, a couple of miles of a city on a warm day: comfortable, cool and easy. The weight and flexibility make it feel effortless, and being able to wear it without socks in summer is a genuine daily benefit.

For longer walking, no. The shallow midsole is the limiting factor and it arrives sooner than you would like, usually somewhere between two and three miles on pavement. There is no arch support to help you and no rocker to save your calves. If your walking is exercise rather than transport, treat the Go as the shoe you wear to the walk rather than on it, and buy something cushioned for the miles.

More walking shoes in our guide.

Travel, hot weather and sockless wear

This is the use case where the Tree Runner Go beats shoes that cost more and cushion better. Lyocell handles moisture well, so bare feet stay comfortable rather than sweaty, and the open knit lets heat out instead of trapping it. On a hot holiday that is worth a great deal.

The washability compounds the benefit. Pull the insoles out, put the shoes through a cold gentle cycle, and let them air dry away from heat. A shoe you wear without socks needs that, and most sneakers do not survive it.

If you use orthotics, the insole lifts out and a low-profile device will fit. A bulky custom orthotic is a poor match, because the shoe has little internal volume and the soft knit will not hold the device in place the way a firmer upper would.

Tree Runner Go vs the original Tree Runner

Both are current, both are sold side by side, and the choice between them is genuinely a choice rather than an upgrade.

You will like the Go if you want the coolest, lightest version and you mostly wear it in warm weather or on trips. Buy the original if you want the shoe to hold its shape a little better over a year of daily wear, or if you live somewhere the weather does not cooperate.

Allbirds Tree Runner Go Alternatives

The Go’s particular combination is light weight, breathability and washability. Each of these alternatives trades one of those away for more shoe underfoot.

Skechers GO WALK 8 is the value comparison and it is a close one. It is similarly light and similarly casual, and it has noticeably more foam underfoot, which makes it the better choice if the Allbirds’ shallowness is what worries you. It costs far less, and it does not breathe as well or look as tidy (check price | read review).

Readers who want the same easy everyday role but with real weather protection should look at the Hoka Transport 2. It has a much deeper midsole, a Vibram outsole that grips wet ground and enough structure to walk properly in. It is heavier and warmer, so it is the winter answer to the Go’s summer question (check price | read review).

If the appeal is a smart, light shoe you can wear with normal clothes, the On Cloud 6 competes directly. It is firmer underfoot and less breathable, and it has a more durable outsole and a sharper look. Consider it if you liked the idea of the Allbirds but want something that will survive more pavement (check price).

Price and value

The Tree Runner Go launched at $120 in April 2024. For a simple sneaker with a thin foam sole, that is not obviously good value, and there are shoes at half the price that cushion better. What the money buys is the upper: a genuinely different knit made from certified wood fibre and recycled polyester, which breathes better than anything synthetic at the price and can go through a washing machine.

The other side of the ledger is lifespan. The foam outsole wears faster than rubber, so you should expect a couple of seasons of regular wear rather than several years. If you want the breathability and the materials, the price is defensible. If you want the most comfort and durability per dollar, it is not.

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Final verdict

Best for: warm-weather everyday wear, travel and anyone who likes wearing shoes without socks.

Avoid if: you need arch support, you walk more than a couple of miles at a time, or you want a shoe that will last years on rough pavement.

Fit: snug and sock-like, one width. Size up if you are between sizes.

Verdict: the Tree Runner Go is a specialist pretending to be a generalist. As a light, breathable, washable shoe for hot days and holidays it is close to unbeatable, and the eucalyptus knit is not a gimmick. As a walking shoe it is shallow, unsupportive and not especially durable, and $120 asks a lot for that. Buy it for summer and travel, keep your expectations at a couple of miles, and it will be one of your favourite shoes. Check the latest price.

Frequently Asked Questions for Allbirds Tree Runner Go