So, I found the above “sheet”. Quotes, because when I laid it out to photograph, I realized although the material feels like a sheet, it is two sided/stitched together. Just over 50″ wide, open at the bottom with 5 buttons along the edge to secure it.
What the heck? It’s well done. It looks like it could have been manufactured this way, but maybe it was someone’s craft project? For what reason? Any idea what it might be used for?