Crown Comfort 6-inch Premium Memory Foam Mattress-Certipur-us&reg; Certified-Queen Mattress Layers: 1" Memory Foam (Infused with Charcoal), 2" Soft Comfort Foam (Pressure Relief System), 3" High-Density Base Foam The foams are infused with Green Tea and Charcoal which minimizes the use of petrol based chemical oils, working to eliminate chemical odor and to absorbs moisture. Amazing comfort from body-conforming memory foam Relieving pressure points for deeper sleep Certipur-Us certified memory foam - 10-year manufacturer warranty