Anto, I'd look at merino wool, for comfort & breathability. I have a circulation problem, so I need to wear compression socks. A lot of the time, I wear nylon-based knee socks, "empire-builders", as they're known in Southern Africa (Andre will smile, I know.)
In my search for Socks That Work Really Well, I've found a source in the US, Swiftwick. They make a range of socks for sports, different sizes, different fabrics. The best I've found are their merino socks. For me, I use their knee-high items -- cycling, snowshoeing, cross-country skiing, hiking, running, motorcycling, in all 4 seasons. They're pricey (USD35 a pair) but they're the most comfortable socks I've ever worn. And they're durable.
Swiftwick do make ankle-high merino socks which fit cycling shoes very nicely, & I wear those occasionally as well.
Icebreaker, the NZ firm, also make merino cycling socks. (Icebreaker has one of the world's best puns: each of their items has a baa-code identifying the source of the wool.)
One of the best things about merino is that it hardly stinks at all.
Hope this is helpful, & good luck.
J.