From Germany, Fortissima and Socka are commonly considered the best sock yarn available anywhere 50 gram skein from Schoeller + Stall

Those who want to do their sore feet a real favor wear soft, cozy and warm socks. And if the socks happen to have been knitted by someone special, it should be considered a special sign of their appreciation. Schoeller + Stahl have developed Fortissima/Socka - the most popular sock yarn just for occasions like these. Using only the finest raw materials which are then processed at the highest level possible. Due to the high percentage of virgin wool, Fortissima/Socka is particularly soft and very supple. You will notice the moment you start knitting. The sock yarn is also, of course, a wash and wear product, which means hand-knitted socks will pamper you for a long time to come.