Sustainable (natural vibe) socks, NL/EU based

Hi there! I'm new here so I hope I'm doing this right. I need to replace most of my socks because the bottoms are basically disintegrated. I'd like to replace them with more sustainable socks to start my journey of eventually getting my whole wardrobe more sustainable.

Does anybody have suggestions for brands or shops to find fun/colorful socks that will actually last a long time? Preferably made in the Netherlands/Europe. If you know of any physical shops to go to in or around Zwolle would be nice too!!