We designed The Eco Pure Rest Futon Mattress for anyone seeking a supremely Comfortable but Firm Mattress. This Chemical Free Sleeping Product features a 4? Inch Core Of All Natural Organic Dunlop Latex and is filled with Wool Harvested From Sheep Humanely Grown In The U.S.A. It is important to know that the Latex Cores we use for our Eco Pure Rest Futon Mattress are 100% Pure Dunlop Latex and never include synthetic Latex blends. We take extra care to verify our materials so you can know for absolute fact that you are sleeping on a Chemical Free surface.