Twin 10" Memory Foam Mattress with 3" 5LB density Viscoelastic Memory Foam Made with 5lb density High Quality 100 percent Viscoelastic Memory Foam. Temperature sensitive viscoelastic conforms to your body relieving pressure points for better sleep. 10 Year Warranty! 90 Day Satisfaction Guarantee. FREE SHIPPING TO 48 STATES. Washable Four-way Zipper Cover.