9-Inch TWIN XL Memory Foam Mattress with 4" of Medium-Firm Visco Elastic Memory Foam with 1 Free GEL Pillow Two layer construction 9-inch premium memory mattress featuring exclusive open cell memory foam, USA made quality memory foam provides superior comfort. Comfort layer made with 4-inches of 4-lb density memory foam; 5-inch base layer of premium support foam provides maximum therapeutic support. Made in the U.S.A., not imported Memory Foam, 4 Way Zippered Fire Proof Cover, 60 Day money back guarantee! CertiPUR-US Certified, free of any harmful materials. Meets federal flammability standard 16 CFR 1633. Provides even support across the entire surface of your body, relieving pressure points that can cause poor sleep and soreness. Keeps your spine in proper alignment and increases your blood circulation, giving you a great nights sleep.