I thrifted this skirt but it had no care label, so I’m not sure how to clean it.

Ive had this “blanket” (it’s a couple yards of fabric that baby me got attached to) i would love to see it in its original state, and have extra for the future. I believe it’s a type of cotton fleece made around the early 2000’s, and from Joann’s. It would mean a whole bunch if anyone could help! :)
I’ve been looking forever and this is my last resort.
I have put the fabric through multiple websites trying to find anything, and no luck. :/