We are frequently asked what should be used as a foundation for an organic mattress. First, a little mattress history. In the very old days, of course, people slept wherever they could get comfortable.
In the middle ages things got better—at least for royalty. Mattresses were made of horsehair and other fine ingredients—you could have called them organic, though the term would've been moot before synthetic materials were developed. The big improvement was that mattresses were raised off the floor by wooden beds. That made it a lot easier to get up in the morning.
Foundations A to Z--history, options, and specs.