They use a Kevlar fire barrier that is part of the cover (see here) which is how it passes the fire regulations.
They don’t use Talalay at all (you were given incorrect information)… just Dunlop.
There is more about the different types and blends of latex in post #6 here. Unlike the misinformation on their site indicates … there is Talalay latex available that uses 100% natural rubber (no synthetic rubber) but they don’t use it.