THE FUTON SHOP 9" PERFECT COMFORT ORGANIC TWIN SIZE COTTON/WOOL/FOAM MATTRESS 100% Organic Egyptian Staple Cotton, Chemical free, organically grown. Bioflex Hybrid Foam partially derived from Soybean oil Eco-friendly bedding foam alternative - mattress foam is made partially from soy bean oil - High Density foam core - 4 inches - 50 ILD - 1.45 Density Adds firm support, Natural Virgin Wool - Natural Moisture & Temperature Relief. 42-87 lbs (depending on size) of Natural Support. Eco-Friendly Natural bedding. Grown in America. Comes with standard poly cotton case. Color of the fabric for mattress casing may vary depending on fabrics in stock.