Here's a hint. We bought a 6 memory foam topper (Ebay)to go on top of our old mattress to try it out and also to extend the life of our old mattress. It worked. We slept on it soundly for about 3 years before buying the new one. It also gave us a clue on how we'd love our Memory Foam mattress. DD loved it so much. we cut it down to fit her mattress. It's still up there!