Dimensions: 59W x 79D x 16H in.. Soft support. Encased coil system. Offers extra contoured support. Designed with edge support for end-to-end comfort. Cradles the body. 1-year limited manufacturer's warranty. Take comfort to the next level with the extra-plush Sierra Sleep by Ashley Mt Rogers Ltd Pillowtop Queen Mattress. It features an ultra-soft traditional innerspring with an encased coil system that's designed to offer excellent support. It's topped with layers of high-density memory foam that contour the body and promote sound sleep. Plus, this mattress is designed with edge support, so you can enjoy uniform comfort from edge to edge.