But... their footwear wears out quite quick (the soles esp.), so overall, I do not know that if you were to study its carbon footprint over two years, if they would actually come ahead compared to conventional footwear.
A few cheaper options exist in my closet, but mostly they're more expensive.
I've been wearing the same line of tennis shoes for a handful of years. Outside of work boots for projects, I wear the tennis shoes for almost every other event and task, breaking out dressy black shoes a handful of times per year.
They run around $65 unless I find a deal. That shoe is adequate for my needs and budget, fits well, and the variations from year to year are minimal. I'm hesitant to deviate away from something I know works well.
I've never found a pair of Nike tennis shoes that are comfortable. Nike shoes would probably be more expensive than my go-to pair, but I'm sure for some people my tennis shoes would be really uncomfortable.
All that said, I am considering trying a pair of Allbirds. I'm 4 hours from their nearest store, and have never bought a pair of shoes online, so I may swing by next time I'm in Minneapolis.
They come in whole sizes only; the rest of my shoes are 9.5 to 10.5 depending on application. My Allbirds fit perfectly; both pairs are 10s.
It's good that their inputs aren't horrible for the planet, but if they break down in a couple years it might not make that much of a difference.
Most sportswear shoes, "sneakers" in vernacular, don't accommodate resoling. But evenso, the plastic mesh or wool upper (depends on model) tends to wear out in obvious spots (same as where socks might wear out, like toes).
The best part about them was the convenience and comfort, but as far as style they're maybe one rung up the ladder from Crocs, so you're not really winning points there. They go well with shorts and look particularly awkward in jeans.
They're premium priced and definitely casual in style and function, with a sustainability-focused marketing sheen.
I've had a few pairs and the quality is above-average but definitely not a "buy it for life."
I guess it hasn't affected their valuation much though.