What about off-gassing and non-toxic certifications?

GREENGUARD Gold, CertiPUR-US, and FSC certifications come up frequently on parenting forums like r/moderatelygranolamoms. Several picks here carry one or more of these certifications. Worth noting: certifications don't guarantee comfort — one frequently cited chair in this category is praised for its certifications but criticized in the same threads for an oversized headrest pillow.