The Harvest Green Mattresses are as Pure and Natural as you can get. The Dunlop Latex, Cotton, and Wool are all certified Organic and are environmentally-friendly, renewable and Biodegradable. These mattresses are quality made for both comfort and durability. Supported with a 5 Zone Independently Wrapped Coil Unit, for maximum support, minimized motion transfer and a firm edge. Thick layers of Dunlop Latex provide a soft yet supportive sleep surface.