These pants were spun with mostly wool sliver (very, very lanolin rich wool) or wool in the grease. The white and black stripes are alpaca and llama blends. You can see some of the yarn that went into these pants a few posts down. It was really fun to make these pants! Taso loves them. It was really cool when I was just about done knitting and I knew that I had to spin one more bobbin full to finish the pants.