The Slumbercrest Hybrid Rilian II by Slumberland features a cooling stretch-knit cover woven with Cryo-Ice PE yarn plus heavyweight knit materials for the whole-body comfort you deserve. This mattress features a TheraGel™ antimicrobial memory foam layer, enhanced with copper, graphite and silver to promote a cooler, more comfortable sleep environment. With advanced pocket coils, coupled with this foam technology, this medium-firm Hybrid Bed supports, cradles, and relieves pressure points, night after night. You get medium support, medium soft feel and one hundred percent comfort from the innerspring system encased in an 8” Quantum Edge and 1” of gel base foam.