emma essential mattress, 7 inch, airgocell memory foam, pressure relieving, bed-in-a-box, 100 nights trial, certipur-us certified, twin xl emma the emma essential offers a great night of sleep for a great price! it contains two layers of foam that are developed to provide adaptability and support. the 7 zones in the base layer provide pressure relief exactly where you need it and comfort exactly where you want it. try it for 100 nights and experience your best night of sleep yet!