Hi donlbe,
I should have clarified … I’ve never seen any of their fire retardant cores in North America and I don’t know of any manufacturer that uses them although it’s certainly possible that they are inside a mattress that I’m not aware of.
Their “regular” cores don’t have any fire retardant chemicals.
Latex Green doesn’t sell their latex cores “one off” to consumers although they are available from some of the suppliers that are listed in the component post here. The same list includes some of the better sources for covers that I’m aware of.
Phoenix