Signature Sleep Memoir 10 Inch Memory Foam Mattress, Twin The Memoir 10 is made with a 2" layer of comfortable Memory Foam, followed by a 8" layer of high density foam This mattress molds to the body's natural shape to provide optimal comfort while relieving pressure points This mattress is made with CertiPUR-US certified foam, which is free of PBDEs, TDCPP or TCEP ("Tris") flame retardants, ozone depleters, mercury, formaldehyde, lead and heavy metals. Foam is also low in VOC emissions for indoor air quality The 10 inch Memory Foam mattress ships compressed, rolled, and vacuum sealed in a single box, ready for sleep within a few hours The Memory Foam mattress includes an easy to clean soft mattress cover made of breathable knit fabric. Please allow 48 hours for your new mattress to fully expand to its size