Gone are the days of the thought that yarn must be 100% wool (or very close to it) to felt. The B-4 Bag pattern that I designed originally for Karaoke yarn (50 % wool, 50% soy silk) is shown here in another wool blend. This one is Berroco Foliage. Only 53% wool, and 47% acrylic, would you think it would felt this nicely? It's beautiful!
What I really love about the way this yarn felts is that the acrylic spun along with the wool is all one color, and the wool is what changes color. When felted, the wool shrinks around the acrylic, causing the acrylic to pop out in a beautiful pebbly texture. The wool colors intensify because the acrylic has basically been separated from it in the felting process. It doesn't show as well in this colorway as some of the other colors. We have swatches in the shop, before and after felting, that really shows off the felting properties of this yarn.
I'm not saying that all wool blends will felt this well, but don't be turned off by something you want to try. Swatch and see what happens! You could be pleasantly surprised, as I was, when I was told "Oh, that yarn won't felt....." WRONG!