Sarah Peyton 10-Inch Twin Memory Foam Soft Support Mattress with Bonus Pillow with Contour Pillow Twin Soft Support Memory Foam Mattress is resistant to dust mites and is naturally antimicrobial Supportive 4.0-lb. density memory foam eliminates back and joint pain associated with most common innerspring mattresses Meets all flammability standards Ultra-soft mattress cover is zippered for easy removal and washing Composed of 2.5-inch advanced 'Next Generation' viscoelastic memory foam on a 7.5-inch polyurethane base