I have long loved this yarn and probably adding to its allure is it is so hard to get a hold of! Of course I am talking about the infamous Wollmeise yarn from Rohrspatz and Wollmeise. This yarn is dyed by one woman named Claudia living in Bavaria. Do make sure to visit her site and see all of the pretties! This is the 100g (340 yd) Twin, hand dyed super wash sock yarn made up of 80% wool and 20% polyamid.
Care: It can be washed in the gentle cycle up to about 86 degrees fahrenheit (30 degrees celsius), lay flat to dry.
Other sources: The Loopy Ewe carries this yarn. I think you can get on their email list to find out when they have it in stock. I found this really good article all about where and how to find it. I am pretty sure I have seen it on Ebay before as well. Good luck!