Allswell 3" Covered Memory Foam Mattress Topper, Twin 3" of innovative CertiPUR-US certified Memory Foam for a blissful sleep experience Breathe new life into your old mattress with a luxurious layer gel infused memory foam Conforms and support your body Includes a removable soft knitted cover that is machine washable Stays in place with an anti-slip bottom fabric for added stability Age Group: Adult, Universal.