I purchased just a little bit better than a lace weight yarn, 30% angora; 50% cashmere and 20% nylon, off a peculiar site but it was really inexpensive. When I tried the basic beanie pattern with the yarn; it was too light. I decided to double it, putting it at about a sport weight yarn. I really had to alter the pattern and it still needs a little tweaking but I am close.
Absolutely loved the resulting finish of the yarn. Just Lucious.