You can read more of my thoughts about Foam by Mail (FBM) in post #2 here and post #2 here. I personally wouldn’t have a great deal of confidence that what I thought I was buying was what I would actually receive so I personally wouldn’t consider them when the accuracy of the description of a product I was important or “mission critical”.
This is typical of their evasiveness and is the “style” of answer they have used for years but the truth is they don’t sell Talalay at all.