Wool batting is my favorite. Hobbs makes a 100% wool batting that is nice. It does squish down well for machine qulting, and it is lightweight and warm to sleep under. I follow the package directions and wash my finished quilts in the washing machine and dry them in the dryer on low. Wool can really take more abuse than is commonly believed. It is a tough, resilient fiber. As long as you wash it in cold water with minimal agitation, it should be fine. I mostly make household quilts that are actually used to keep warm under, so the little extra expense is worth it to me. If you are making a wall quilt, I would skip the wool as cotton would give a similar look at less cost.

On bamboo: I’m still waiting to try the new bamboo batting, but I have used the bamboo pillow forms and the loose fiberfill from the same company, and the fibers are wonderful; springy, soft, and light.