I have now spent the better part of every day, for 5 weeks, lying flat on my back on a futon. It’s not particularly comfortable and was making my back hurt.
It finally occurred to me that this can be done more comfortably!
I bought a full sheepskin from Ikea http://www.ikea.com/us/en/catalog/products/70026822and laid that over a Supracor pad I dug out of a tack trunk http://www.doversaddlery.com/product.asp?pn=X1-19081&tid=froogle&CATALOG_CODE=1X814&EID=X1814001&zmam=1460880&zmas=1&zmac=49&zmap=X1-19081.
Now, my back is not nearly as sore. No wonder some horses like their fancy saddle pads!!