Hi GoodNght.
Welcome to our Mattress Forum!
Sorry to hear of your back is hurting … too bad that you didn’t find us before making your “big box store” purchase. Hopefully, you’ll be able now to rely on The Mattress Underground as a resource as you decide on a mattress moving forward.
Dormio is one of our Trusted Members on The Mattress Underground and they have adedicated forum here on the site as well, where I’m sure they’d be happy to directly answer any of your questions.
You will find different people and manufacturers who prefer the properties or “feel” of one material or combination of materials over another for their designs, but which materials you choose should always be based on personal preference and your needs. If you have a higher BMI I would definitely keep in mind that an extra soft latex will wear out and it’s not as durable as firmer, higher-density/ILD latex, this said, even an X soft latex layer would last longer than any other type of foams of similar densities. Any materials in combinations that are suitable for your specific circumstances can provide the combination of PPP (Pressure relief, Posture and alignment, and Personal preferences) and that higher quality materials will last longer than lower-quality materials. An inch or so of softer latex in the quilting of the bed is common in the industry and is not usually considered as a liability when it comes to durability. Foam or fiber that is quilted to a cover will be compressed by the quilting process and would be more durable than the same material that isn’t quilted to a cover.
All latex foam (including 100% natural Dunlop and Talalay and organic latex) uses a small amount of chemicals to manufacture the latex (see the first part of post #7 here ) but the manufacturers don’t release the specifics of their compounding formula which is a closely guarded secret. For any latex to be labeled as organic, it must meet very stringent requirements. Dormio has its certifications for its natural latex on their website. Their organic latex is GOLS certified, and their natural latex is Eco Institut tested/certified and OEKO TEX certified as well. These are very good indicators of meeting the standard requirements and quality. Any additives like phase change materials, graphite and copper that are added to their latex would usually be for some of their specialty products, or to add certain desirable characteristics to the rubber.
You can learn more about 100% natural latex in the above mentioned thread . We also have a good mattress certification thread here.
I hope this helps you with your decision! Please keep us posted on any updates
Phoenix