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I've been buying split toe socks for years now, when they weren't so readily available. A tip to anyone else curious: you can find many different styles/colors in varying quality on Amazon, Temu, Aliexpress, etc. from no-name brands. In general the quality is quite good, at least on par with major brand socks and if you're less confident then just pay attention to the return policy. The main thing to look for is 100% cotton (or natural fiber of your choice).

Edit: I posted this primarily because they're a niche product which translates to niche-consumer prices sometimes. However you don't need to pay more than $2-3/pair to have pretty nice, durable socks of this kind.