I have spend the last 4 months trying to get the right double mattress for my attic bed, though spare I use it most nights as I rest better sleeping alone. Now I tried an Eve mattress because it was a really good bargain and came in a bit easy to take to the attic, unfortunately after more than 2 months there was a really pungent smell coming out from it and had to return it (has one mid layer of memory foam), now I found it most comfortable (I have arthritis and I am not a good sleeper) so I am looking at this type of mattresses rather that spring. I am interested in your hybrid foam mattresses, but I am afraid these will also smell as bad, I am probably allergic to the fumes because it really made me ill the few nights I slept there. I would be grateful if you could let me know as much as you know about the hybrid potential for smell.