Just saw this on Facebook today:
http://www.securebeginnings.com/#!shop-heaven-sent-breathable/c1972

It's a crib mattress with a breathable material suspended over a wooden frame.
Would you try it?
It comes with a pretty hefty price tag - $400+ but I'm intrigued.

"s is specifically designed to be the safest crib mattress available on the market today for your baby. It replaces foam and cotton filled mattresses with a comfortable breathable fabric surface suspended over a wood frame with openings on the sides allowing constant air circulation for your baby. "