Hi nico4321,
The Best Mattress Ever has been discussed in various threads here on the forum. It uses:
Comfort Layers:
2" TitanFlex 3-4 lb. high performance latex alternative polyfoam, 2" TitanFlex 3-4 lb. high performance latex alternative polyfoam.
Support Layer:
6" 1.8 lb 36 ILD polyfoam.
Brooklyn Bedding is the first actual manufacturer that owns their own factory in this category. They have three firmness choices (soft, medium, and firm) rather than one so their mattresses cover a wider range of the bell curve that would meet the needs and preferences of a larger percentage of consumers than a single firmness choice. The cotton cover is quilted with a thin (less than an inch) layer of polyfoam to provide a softer “surface” feel so the mattress finishes at about 11". The TitanFlex is their new version of a high performance latex alternative polyfoam that is a very high density (3-4 lb) that has many of the comfort properties of latex but is even more breathable with a higher tensile and tear strength. The soft, medium and firm versions use different ILDs of the top two comfort layers (Soft = Soft 13 ILD (approx. 3 lb) + Medium 18 ILD (approx. 3.5 lb); Medium = Medium 18 ILD + Firm 28 ILD (approx. 4 lb); Firm = Firm 28 ILD + Firm 28 ILD).
Both the polyfoam support core and the TitanFlex foam are open-cell in construction and quite breathable. A mattress using an innerspring support unit can in theory provide more air movement through those springs. A softer version of either mattress will tend to sleep “warmer” than a firm version of the same mattress, as you’ll sink in more deeply and be more insulated and have less surface area exposed for heat exchange. Overall, there is more about the many variables that can affect the sleeping temperature of a mattress or sleeping system in post #2 here that can help you choose the types of materials and components that are most likely to keep you in a comfortable temperature range.
There is more detailed information between a latex support core and an innerspring support core in post #28 here. All of the layers within a mattress will contribute to the overall feel, so I can’t comment upon what you might have experienced as a “traditional innerspring” feel versus a “foam mattress” feel, as there are quite a few variations within those general classifications. Innersprings do tend to be more “resilient” (more “push back”) than latex, and they have a bit more of a flat line response curve. Some people do consider them more “bouncy” than an all-foam latex mattress.
That’s a great plan!
You’re welcome.
Phoenix