Zinus Memory Foam 4 Inch Tri-Fold Comfort Portable Folding Mattress or Floor Mat Comfort and support from 1 inch Memory Foam, 2 inches Viscolatex Responsive Foam, 1 inch High-density Base Support Foam Twin size The Tri-Fold Comfort Mat is rolled and snugly packed to efficiently arrive at your home Zinus memory foam, BioFoam, is infused with natural ingredients to help absorb moisture, eliminate odors, and keep your mattress fresh Only the Highest Quality of Foam - Foam is CertiPUR-US Certified for durability, performance, and content