Hi buttercupbetty,
You can see a list of the foam manufacturers that participate in CertiPur here* which includes almost all the foam made in North America. I personally would have no “safety” issues with foams made in North America or offshore manufactured foams that are CertiPur certified although some people that are more sensitive or for other personal reasons may use different criteria than most other people to answer the question of “how safe is safe enough for me?”.
ADMIN NOTE: *Removed 404 link|Archived Footprint: certipur.us/pages/for-industry/find-a-foam-supplier/
There are many mattress manufacturers who use CertiPur certified foams even though they themselves have chosen not to go to the time and effort involved to be certified as a mattress manufacturer because the foams they use are already certified.
You can read more about Essentia in this thread and this thread and posts #3 and #4 here. The information and claims on their website are misleading and they are a manufacturer that I would be very cautious about considering.
Phoenix