Pournara socks! Quality guarantee! I have been buying them for decades without any complaints. They are the only ones that have socks made of real 100% wool for winter, thin and very warm! We wear these cotton ones in Greece from Spring to Autumn! (The question about seasons in the survey should have had multiple choice options for all 4 seasons)
The only sad thing about Pournara is their website, which works terribly (or rather, doesn't work) and doesn't have all their products! Not to mention that the presentation organization seems to benefit the sellers rather than the buyers!
Unfortunately, they don't "upload" all their products on Skroutz either..

After the first wash, they shrink a lot, I didn't expect this from the expensive and "renowned" Pournara socks...

+ 100% Cotton (Hydrophilic Cotton).
+ Despite being very thin, they do not sweat.
+ High quality.
+ Greek.

For my taste, they are very thin. They are the "typical" socks in terms of thickness that are worn, for example, with suits. I had tried socks of this thickness in the past and they would sweat unbelievably. So, when I held them in my hands, I was afraid that the same story would repeat itself. But there is no comparison, I was pleasantly surprised. Obviously, the quality of the material makes the difference.