Hi imcgehee,
You have some great choices in all three areas.
Dallas/Fort worth is in post #4 here.
Houston is in post #2 here
Austin is in post #2 here.
As you probably already know … it’s difficult to know what you may be reacting to because it could be fire retardant chemicals, chemicals in the polyfoam or memory foam itself, or the adhesives in your mattress. There is a great series of articles here about fire retardant chemicals and the fire regulations that were put in place in 1997.
With a prescription from a medical professional, you can also purchase a mattress without fire retardants at all and avoid sales tax as well.
For most people that are sensitive to chemicals, latex, natural fibers, and innersprings without any added chemicals are the “safest” way to go.
Sovn sells the Berkeley Ergonomics line of mattresses but unfortunately their pricing is higher than any of the other dealers in the country.
White Lotus, OMI, and Natura can also be “safe” choices (although they are not necessarily the best “value”) but for those that are looking for organic (rather than just natural or “safe”) … then the OMI factory is the only one of these three which has a certified factory. Their mattresses are very high quality but they are also sold at a premium price. In most cases … knowing the details of what is in your mattress and choosing materials that are known to be safer (or natural or organic depending on the person) is one of the most important parts of choosing a mattress for those who are chemically sensitive and and of course in making meaningful comparisons between mattresses in terms of quality and value. There is more in post #6 here about the different types of synthetic, natural, and organic latex.
There are also some good online manufacturers listed in post #21 here that use either “safe”, natural, or organic components in their mattresses and which can also be a good “value reference” for local purchases.
Phoenix