@Schrecke@knitting it's a merino sockyarn with a little bit of silk. I bought it from here: https://wolltick.com/p/ferner-lungauer-sockenwolle-4-faedig-mit-seide (colourway 525-22, also have 524-22) when I visited that town while on a trip with friends. I decided a while back to buy sockyarn (or similar) and knit sock to commemorate awesome trips with friends or vacations instead of always buying souvenirs. 😁