DynastyMattress New 8-Inch Cool GEL Memory Foam Mattress-Twin Size 2" GEL 4lb Density Memory Foam: Sleep Cool Technology Foam! 2" AirFlow Foam Support, 4" High density foam for ultimate support base! Made with High Quality and durable 3-layer construction! Luxurious white cover, fire barrier, 4 way zipper washable cover 120 day trial! Warranty: 20 years Limited Warranty.