Hi Saphireblue,
There is more about the different types of latex allergies in post #2 here. It’s possible that you were reacting to some latex particles in the air because most Savvy Rest stores would be rearranging bare latex layers for their customers on a regular basis. While a true type I allergy to latex would be very rare compared to a type IV or contact allergy (which are more common but don’t generally affect choosing a latex mattress because there is no contact with the latex) … it’s certainly possible (and much more serious) and if you suspect that you may have a type I latex allergy then it would be a good idea to see a health professional and get tested just in case you need to carry an epipen because of the prevalence of latex in our society.
If you are reacting to contact with dust particles and have a type IV or contact allergy or sensitivity then it’s possible that some types of latex may affect you and others may not because different manufacturers can use different curing packages to manufacture their latex. It may also good idea to ask for a sample and carry it around with you for a day to see if you are sensitive to the latex in a specific mattress you are considering.
You can see the layers and components of their encased coil mattress with memory foam here (click the “construction” tab) and there is no latex listed in the materials and components.
I don’t keep a record of the individual mattresses or their specs that the retailers and manufacturers in the hundreds of forum lists throughout the forum carry on their floor or have available online (it would be a bigger job than anyone could keep up with in a constantly changing market) but checking their websites and making some preliminary phone calls to the retailers/manufacturers that are on the local lists is always a good idea before you decide on which retailers or manufacturers you wish to deal with anyway. This will tell you which of them carry mattresses that would meet your specific criteria, are transparent about the materials in their mattresses, and that carry the type of mattresses that you are interested in that are also in the budget range you are comfortable with. Once you have checked their websites and/or talked with the ones that interest you then you will be in a much better position to decide on the ones that you are most interested in considering or visiting based on the results of your preliminary research and conversations.
The last time I talked with them Mt Airy didn’t carry any of the Restonic latex mattresses but this may have changed since and they don’t list the specifics of the models they carry on their website so I don’t know if any of their mattresses contain any latex.
The only way to know whether any mattress has a good support system that would be a suitable choice for you in terms of PPP (regardless of whether it would be suitable for anyone else) will be based on your own careful testing and personal experience.
Phoenix