A champion of comfort for all, Serta has pioneered sleep innovation for more than 90 years, bringing quality products to more than 150 countries worldwide. Serta's award-winning iComfort S15GL 12"" Firm Mattress presents a sleep experience that is cool, comfortable, and restorative. This supportive mattress offers a hybrid construction with layers of EverCool Fuze Gel and TerraFusion Memory Foams that provide both pressure-relieving support and contour to the body and which are matched by the targeted support of 1,000 Series 5-Zone Quad Coils.