Specifically designed to address the 5 most frequently cited sleep issues, the Landham features advanced technology in a firm, specialty foam mattress. At the surface, the addition of Support Foam with Cool Action™ Gel Memory Foam, provides extra support and comfort throughout the night. Proper spinal alignment is promoted by the Comfort Last® Foam Core which is further enhanced by the Ultimate Edge® Foam Encasement. Plus, the Serta Perfect Sleeper® is the only official mattress of National Sleep Foundation, America's leading voice for sleep health and safety!