I believe it calls for Wool-Ease from Lion Brand. (I don't know for sure though. I have a photo copy of the pattern and I am missing the first page of it with the yarn/gauge requirements.) I am using *gasp* Red Heart "Soft" yarn for mine. I, too, wasn't sure how the pattern would actually work up and so I was a bit leary of dropping a bunch of cash on yarn for this project and then have it be awful.
How's everyone coming? I am working on the sleeves right now. (Why do sleeves take so LONG...!) Can't wait to see FOs.