Hey MaryD,
I’m sorry, but I’m not completely familiar with the Doremo line of mattresses. However, I did find a post with some good links about this line of products discussed previously here on the forum.
Regarding the Natura mattress, this is using totally different componentry and everything you listed would be a good quality material (Dunlop and Talalay latex). This is very different from the polyurethane foam and the memory foam used in the Dormeo mattress you mentioned.
As both mattresses are available for you to test out in person, that is a major bonus for you.
I can’t pick a mattress for you or tell what may or may not work best for you specific situation. I think something good for you to read would be the mattress shopping tutorial on this site, which helps guide people through their mattress shopping process. Here is a link to that.
As for off-gassing, everything off-gasses something. There’s a really good post about this that’s commonly copied on the forum that you may find interesting. I’ll copy it here for you (no need for me to reinvent the wheel):
Most people that are looking for an “organic” mattress or materials are usually concerned more with “safety” than whether the materials have an actual organic certification and they usually aren’t aware that an organic certification isn’t the same thing as a safety certification. There is more information about the three different levels of organic certifications in post #2 here and some of the benefits of an organic certification in post #3 here and there is more about the different types of organic and safety certifications such as Oeko-tex, Eco-Institut, Greenguard Gold, C2C, and CertiPUR-US in post #2 here and more about some of the differences between organic and safety certifications in post #2 here and there are also some comments in post #42 here that can help you decide whether an organic certification is important to you for environmental, social, or personal reasons or whether a “safety” certification is enough.
The Natura mattress you’re considering would generally be able to pass more stringent testing for harmful substances and VOCs.
Also, once you pick a mattress, make sure to reevaluate your pillow to assist with your neck issues.
That’s the best advice I can give you for products about which I am not completely familiar. Good luck!
Jeff Scheuer, The Beducator
Beducation / Mattress To Go