Would this be a potential concern in regards to your mattresses?
Answer: Unfortunately, this vendor, as most have very little knowledge about mattress components, and even less for natural foams and foams in general.
Natural rubber foams retain their moisture significantly more than synthetic foams, that’s why they are more durable. The dryer the climate, the more important it’ll be to have such a product.
There are however certain latex foams, those that are blended and cured in countries like Sri Lanka, Malasia, Indonesia, Vietnam; while these countries are great suppliers for the raw latex milk, they do not have the sophisticated equipment, climate controlled labs, and know how to produce a refined, flexible latex foam. The result of inferior processing is in fact a product that may dry faster and crumble. This is not a quality found in Latex, this is a quality found in unrefined latex.
For years latex foams have been recognized as the longer lasting product in regions like Italy and Spain who have very dry climates, and of course part of the lab testing includes climate simulations and latex foams outperform in every test.
Hope this helps.