RESTOR Style Classic Comfort Memory Foam Collection 10-Inch Plush Support Twin Mattress with Bonus Pillow Composed of 2-1/2-inch advanced viscoelastic memory foam on a 7-1/2-inch polyurethane base Supportive 4-pound; density memory foam eliminates back and joint pain associated with most common innerspring mattresses Includes 1 memory foam contour pillows an added bonus Ultra-soft mattress cover is zippered for easy removal and washing Memory foam is resistant to dust mites and is naturally antimicrobial and meets all flammability standards