Hi AT,
I would want to know the specifics of every layer in the mattress including the thickness of every layer (listed from top to bottom) not just more the more general information they provided you. The thickness is important so that you can confirm that the thickness of all the layers adds up to the thickness of the mattress. Some of the information they provided was also not completely accurate. There is no such thing as “organic” Talalay (there is only blended Talalay and 100% natural Talalay) and all latex that is made in a mold has pincores (holes) in the latex which are part of the mold they are poured in. If the 3" polyfoam layer is about 1.5 lb density or better then it wouldn’t be a weak link in the bottom of a mattress but many latex mattresses use thicker layers of polyfoam on top of the mattress as well and this could affect temperature regulation as well as the durability of the mattress.
There are also many manufacturers that don’t spend as much on advertising as the major brands and none of the major brands have an all latex mattress anyway at the moment. Some of the smaller manufacturers do even less advertising than Restonic so their comment here is mostly about “marketing”.
If the total height of your mattress is 15" then I would strongly suspect that there is less than 12" of latex in the mattress. The percentages of polyfoam and latex listed on the law tag may be a “clue” although it only shows the percentage of each material based on weight and doesn’t list the thickness of the layers, the type or blend of the latex, or the order of the layers.
While it’s not possible to quantify the sleeping temperature of a mattress relative to a particular person or to always identify exactly why they may sleep hot on a specific mattress because of all the variables involved … there is more about tracking down the reasons for any temperature regulation issues in a mattress in post #2 here. The first step would be to confirm the specifics of the materials inside your mattress which would make it easier to make some comments about the possible reasons.
Wool quilting is normally a very temperature regulating material and wool quilting can also be used to pass the fire regulations as well without needing a separate fire barrier but if your mattress uses a separate fire barrier then it’s likely that the amount of wool or silk in the quilting or the cover fabric is quite low so it may not be having much effect on temperature regulation.
I would be somewhat cautious here and make sure that you know the specifics of every layer in the mattress you are considering because I suspect that the information that you have been given may not be completely accurate.
Phoenix