Hi NHdad,
The latex in their mattresses are OekoTex certified (both the synthetic and the 100% natural) and the polyfoam in the quilting is CertiPur certified (Certipur is a certification for memory foam and polyfoam) (Note: Spindle is now only using 100% natural continuous pour Dunlop and wool quilting in their mattresses). OekoTex is a more stringent certification than CertiPur although they test mostly for the same things. Both the synthetic and the 100% natural latex are tested to the same OekoTex standard 100 standards but below the testing threshold for OekoTex there would be no way for a consumer to know the difference between two materials in terms of VOC’s. You can see the testing limit values for Oeko-Tex here and for CertiPur here*[/url].
ADMIN NOTE:*Always check CertiPur site for the latest guidelines available
They use Dunlop that is made using a continuous pour method which can produce a latex core that is more consistent in terms of firmness levels and can also produce a softer latex than you would usually find with molded Dunlop. There is more about the different types and blends of latex in post #6 here.
Phoenix