Ha, ha - I just realized this is my first-ever post about spinning. Oh, have I missed spinning - and I didn't even realize it. I dusted off my spinning wheel the other day. Literally dusted it off. The poor thing was pretty filthy.
I had this "art batt" in a pretty green-based palette of mixed fibers (wool, bits of silk and viscose) that spins up into a textured yarn. I'd spun a bit of it some years back. I oiled up the wheel and finished up the batt.
I noticed that the batt had become matted in places. Not too badly; I was able to coax it by opening it up sideways and then predrafting it lengthwise before spinning. But that matting that occurred just from it being in the plastic bag and moved from one basket or box to another over the years gave me the idea it might felt well also. So with some of it I made a piece of matching felt.