Ergonomics of Sleep: Sweet Dreams on a Hard Surface at www.zafu.net/sleepergonomics.html
Profound experience and research debunking the bedding industry's sales gimmics. I am the author of the article. I designed a firm sleep surface with slatted platform frame and organic kapok/wool futon. Also contains infrar red calming effect. Trying to get back to simple and introduce the idea that the body benefits from resistance (in this case, something reletively firm like we had before modern bedding.) Also regulates body temp and respiration better than any other material I could find.