The only GOLS certified organic latex cores that are available in the world are Dunlop and there is no certified organic Talalay … only 100% natural Talalay (which means that there is no synthetic rubber in the latex because there are also other ingredients in the compounding formula for any latex besides the latex itself. There is more about the different levels of organic certifications (the agricultural material, the latex core, and a mattress itself) in post #2 here and the posts it links to. Latex International only makes Talalay latex and none of the raw materials they use or the latex latex cores they manufacture are certified organic.