SilverRest Sleep Products Twin/X-Large 12-Inch Memory Foam Mattress 12-Inch Therapeutic mattress made of 100-percent Viscoelastic Memory Foam - Twin XL Size (38-Inch by 80-Inch) Includes 5-Inch top layer of high-density 5.3-pound Memory Foam, as well as Cool Airflow layer to keep you cool throughout the night Conforms to your body shape to relieve pressure points, providing a more restful and comfortable sleep while reducing aches and pains 100-Percent velour style cotton cover that zips 4-ways for easy removal and cleaning; Anti-Microbial and Dust Mite Resistant 20-year warranty; 120-day in-home guarantee; will perform the same as a name brand mattress or your money back