Hi odrunr,
As you know from the site a mattress is only as good as its construction and the materials inside it but unfortunately most retailers have very little knowledge about the quality of the materials in their mattresses or in many cases even how to tell. The few that do are among the exceptions in the industry … even though outside of the comfort and support of a mattress it’s one of the most important parts of making an informed choice.
The retailers and “brands” I list are based on the likelihood of being able to find out the information you need … but the good news is that I have talked with the owner of Eclipse and Eastman House (who also manufactures Therapedic in some regions of the country) and they will provide this information to their retailers so it’s really a matter of whether the retailer will take the time to find out for their customers.
I’m looking forward to your feedback from a visit to Westco and any of the other options you visit … and of course feel free to post any questions you have along the way.
You can read more about latex here but in general it is the most durable and the most breathable (coolest) of all the foam materials (polyfoam, memory foam, and latex foam). You can also read more about all the factors that contribute to the sleeping temperature of a mattress in post #2 here
Phoenix