The Allbirds Tree Runners are great for gentle walking – but not for cross-country hikes.

The Allbirds Tree Runner shoes are made from breathable, flexible materials but there's not much cushioning or support in the eco-friendly shoe.

Allbirds Tree Runner shoes being worn on grass
(Image credit: Future)
Fit&Well Verdict

These eco-friendly shoes have a breathable mesh upper and a flexible sole, which makes them super light on the feet. The minimal cushioning in the mid-sole won't suit all walkers, but it's sufficient if you're only going for gentle walks on even ground.

Reasons to buy
  • +

    Lightweight

  • +

    Flexible sole

  • +

    Eco-friendly

Reasons to avoid
  • -

    Minimal cushioning

  • -

    Not waterproof

There's a lot to like about the Allbirds Tree Runners. They're very eco-friendly – thanks to their sustainable materials – and they look fairly stylish too. The breathable, eucalyptus upper means that the shoe doesn't feel too warm in hot weather and the lightweight material means that they feel almost weightless on the foot.

These are undoubtedly the best shoes for walking if you’re an eco-conscious buyer. However, there is a catch, which is that they don't provide much in the way of cushioning. If you're using these to walk over uneven ground, you'll feel everything that passes underfoot. 

We didn't find this caused any serious discomfort and there are even some benefits to wearing a lightweight, pliable shoe. But if you’re buying shoes for more serious off-the-grid walking holidays, then you should opt for something more substantial. 

Design and technology

Allbirds Tree Runners laid on grass

(Image credit: Future)

The Tree Runner is a shoe for the environmentally conscious. The upper is made from eucalyptus fiber, a fast-growing tree that lives on natural rainfall, while the SweetFoam midsole is made from renewable sugarcane. There’s also a soft insole made from Merino wool and castor bean oil – and the shoelaces are made from recycled polyester.

Using these sustainably sourced materials does come at a price. The SweetFoam midsole was noticeably thinner than those on the other shoes we tested. And while the eucalyptus upper is breathable, it isn’t thick, so it won’t protect you from prickly bushes and other niggly plants. 

Arguably, this is looking at the Allbirds in the wrong light; if you’re using the shoes to travel across city streets and sandy roads, then you don’t need all these layers of protection. In fact, having a pliable, soft-material shoe allows you to connect more solidly with the ground beneath you. And their soft, breathable design means that they’re excellent in hot weather.

Fit, feel and comfort

Allbirds Tree Runner shoes being bent by hand

(Image credit: Future)

As mentioned, there’s minimum cushioning here, especially under the ball of the foot. The silver lining to this minimalist approach is that the shoes are lightweight, coming in at just 0.5lbs. If you hate feeling constricted by clunky, heavy boots, then these are a great option. 

We also found that there were situations where the flexibility of that thin midsole came in handy. When pulling ourselves along uneven terrain, we were able to easily bend the shoe around awkward shapes in the ground.

Allbirds actively encourages you to wear your shoes without socks, which we tried out. We were pleasantly surprised that there was no odor after doing this. This quality is apparently down to the Merino wool insole liner, which wicks away moisture when you sweat. The shoes can get surprisingly hot if you do wear socks, so we’d recommend getting comfortable being barefoot in these sneakers.

Everything feels pliable about this design: the heel counter, which forms the back column of the shoe, and the collar are soft. And the stretchy eucalyptus upper on this shoe means that it can accomodate any foot shape. If your toes splay out a little or you have wider feet, you should be able to fit into them comfortably.

Support

Allbirds Tree Runners upside down showing tread on outsole

(Image credit: Future)

The outsole of the shoe is lined with deep ridges, which provide a decent level of grip. This isn’t as comprehensive as something like the GoWALK Arch Fit Motion Breeze, which has two types of rubber installed on the bottom. But if your shoes are primarily going to be used for walking along streets or sandy areas, it should be sufficient.

There’s a nice little curve of arch support built into the shoe, thanks to that removable insole, which provided support during longer walks of 10,000+ steps.

User reviews

Allbirds Tree Runner shoes on someone's feet

(Image credit: Future)

There are hundreds of glowingly positive reviews for these shoes online. Out of 665 bits of feedback on the Allbirds website, the shoes have netted an impressive 4.7 out of five stars. Happy customers praise the comfort, aesthetics and sustainability credentials of the shoe.

The handful of negative reviews are mostly focused on sizing issues: the website advises that customers go down a size, as the shoe supposedly expands to fit your feet, but some customers have found this isn’t the case. Other negative reviews state that the shoes are too soft and provide too little support. 

Verdict

Allbirds Tree Runner shoe merino wool liner

(Image credit: Future)

These are the ideal shoes for traveling: lightweight and breathable, they are great in hot weather as long as you’re happy to ditch your socks. The flexible outsole on the shoe means that they can easily be flexed around uneven terrain, but the lack of cushioning might not suit all walkers. 

We’d recommend these shoes if you’re someone who prioritizes sustainability. The credentials for the shoes are watertight, thanks to the use of renewable materials and a carbon-neutral manufacturing process. However, if you’re planning on a serious hiking holiday that’s going to take you into rough, rugged terrain, we’d recommend you look elsewhere for a walking shoe.

Also try

A person wearing Merrell Moab 3 walking shoes standing on wet grass.

(Image credit: Harry Bullmore)

Merrell Moab 3

The Merrell Moab 3s (opens in new tab) might not have the same sustainable materials as the Allbirds design, but they are built to last. Made from tough pig skin, it’s packed with all kinds of rigid support, with a protective toe cap and a special air cushion heel that absorbs impact.  

Skechers Go Walk Arch Fit Motion Breeze

Close up of Skechers GOWalk Arch Fit Motion Breeze shoes worn by person

(Image credit: Future)

These chunky trainers from Skechers are a little heavier than the Allbirds, but they look surprisingly similar. With a more cushioned midsole and a greater level of grip, they’re more of a 'serious' walking shoe with a higher level of support. This does mean that the sole is inflexible, but if you prefer a 'springier' type of shoe then this is a good option.  

Ruth Gaukrodger
Ruth Gaukrodger

Ruth Gaukrodger is the fitness editor at Future Plc. She covers everything from fitness trackers to dumbbells for sites like Live Science, Fit&Well and Tom's Guide. When she's not reviewing equipment in our dedicated testing centre, you'll find her racing round the streets of London in her favorite running shoes or working on her yoga skills from the comfort of her living room.


Originally a print journalist, Ruth worked across national newspapers and popular tech sites before coming to Future. She has worked as a commissioning editor across other Future titles too, including Space.com and Top Ten Reviews. Now focused solely on fitness topics, she hopes to demystify the world of exercise with honest, straightforward content.