BTS Blanket/Poster/Sheet NWOT

I picked this up thinking it was a sheet. It's is long I'm guessing 10+ feet tall so it's kinda tall for a bed. It has double fabrics the front part is a soft felt like material and the back is a satin type material. When I was folding it I noticed that it had a zipper along the bottom where you can open it like a sleeping bag. It could be used as a sheet or a poster if you have high enough ceilings. NWOT