The cheaper memory foam mattresses on Amazon right now aren’t pure memory foam, but mixed foam, and they are much more breathable while you sleep. Something like http://www.amazon.com/LinenSpa-Viscoelastic-Mattress-20-Year-Warranty/dp/B00474X5DO/ref=sr_1_10?ie=UTF8&qid=1324654812&sr=8-10 claims air flow as a product feature.
The cheaper memory foam mattresses on Amazon right now aren’t pure memory foam, but mixed foam, and they are much more breathable while you sleep. Something like http://www.amazon.com/LinenSpa-Viscoelastic-Mattress-20-Year-Warranty/dp/B00474X5DO/ref=sr_1_10?ie=UTF8&qid=1324654812&sr=8-10 claims air flow as a product feature.