Hi AT,
Thanks for updating the specs … and I agree that it’s unfortunate that you weren’t able to find them out before you made your purchase since the 2.5" of “unknown density” polyfoam on top of the latex in the quilting layers are thicker than I would normally be comfortable with and could be a weak link in the mattress.
All the foam that is generally used in mattresses (polyfoam, memory foam, latex foam) is open celled and “breathable” … it’s just a matter of degree and “how breathable” they are. Quilting foam is generally more breathable than other types of polyfoam that are used deeper in the mattress.
I don’t think that there is much that I can add to my comments in post #18 here about tracking down temperature issues. Mattresses that use thicker/softer foam comfort layers will generally sleep warmer than thinner or firmer comfort layers since you will sink into them more deeply and they are more insulating.
The first place I would start with temperature issues is your mattress protector and your sheets and bedding (your mattress protector in particular has a “semi breathable” membrane which can certainly affect sleeping temperature for some people).
There is some information about Celsion in post #4 here and about Coolmax in post #17 here. I don’t think that any of these would be a “magic bullet” solution but they might make a small difference. The only way to know for sure whether they would make “enough” difference would be based on your own personal experience.
Rayon is a semi synthetic fiber that is made from some type of cellulosic material which includes bamboo and other types of wood pulp such as beech or eucalyptus. There is more about rayon in the post about sheets that I linked previously. It is generally very breathable and wicks moisture well so it wouldn’t generally be an issue with temperature regulation and would be similar to natural fibers.
Dacron is another name for polyester fiber. It would be more breathable than most foam layers since it’s a fiber but it can also sleep warmer than natural or semi synthetic fibers since it doesn’t absorb moisture as well as natural fibers such as cotton, rayon, or wool.
Phoenix