I think my wool socks have a little synthetic fiber to help with that.

I tried less expensive wool socks, like from costco, and they were too warm and moist.

Then I tried darn tough wool socks and they are always warm and dry - even in summer.

It's not a problem if you find appropriate quality and thickness. One example is Icebreaker Ultralight socks. I use them in summer and they are rather thin.

> One example is Icebreaker Ultralight socks.

The website says they're actually 38% polyamide and 2% elastane. I think they're 'wool mix' socks rather than wool socks.

Indeed. I think that is to allow them to stretch. If you take something like a shirt, for example, it'll be all merino wool.

EDIT: Also I see that the proportions differ based on the type of socks.

Try bombas wool. Great everyday wool sock

I've never tried bombas wool, but I have a pair of bombas socks which were gifted to me, and other than being quite tight, they are serviceable. Make sure you get a large enough size.

Bombas are one of the few brands I would recommend to anyone because they donate one pair of socks for each that you buy.