Hi Trina, Completely non toxic. all our mattress overlays are right here in Australia. using world leading technologys. They are certified Gecca approved and meet all the world best practice environmental standards. The best thing about our foams is they use Carbon Dioxide as the blowing agent (which gives the foam its volume) and we are one of the very few mattress overlays who use this method. You are welcome to give us a call and discuss further but hopefully this information helps to put you at ease. Warm regards, Brett Parnham03 8585 6685