Hi pinoyski,
Post #2 here and the posts it links to has more information about safe, natural, organic, “chemical free”, and green mattresses and mattress materials that can help you sort through some of the marketing information and terminology that you will encounter in the industry and can help you differentiate between them and decide on the types of materials you are most comfortable having in your mattress and help you answer “how safe is safe enough for me”. These types of issues are complex and are generally specific to each person and their individual sensitivities, circumstances, and specific criteria.
Unfortunately there are too many unknowns, variables, and personal preferences involved for someone else to be able to predict which specific mattress is the best “match” for you based on specs (either yours or a mattress) or “theory at a distance”. There is more about the different ways to choose a mattress that can help you identify and minimize the risks involved in each of them in post #2 here. There is also more about the most important parts of the “value” of a mattress purchase that can help you make more meaningful comparisons between mattresses in post #13 here. I would keep in mind that the choice of materials in a mattress is a preference choice and not so much a “better/worse” choice.
There is also more about the pros and cons of latex vs memory foam in post #2 here.
Phoenix