Choose from the available size options. Cool gel memory foam and motion reflex mattress. 14.5 in. thick hybrid mattress. ActivPur and AirCool gel memory foam layers. Motion reflex layer maximizes cooling air flow. Optional box spring in choice of available sizes, heights. 10-year manufacturer's warranty. For customized support, the thick and plush Beautyrest Platinum Hybrid Emerald Falls 14.5 in. Ultra Plush Mattress offers multiple memory foam layers plus a motion reflex layer. Just below the luxurious cover is an InfiCool HD surface that moves heat away from your body as you sleep. ActivPur memory foam is infused with platinum for a cooling sleep and antimicrobial benefits. AirCool gel layers offer pressure relief, freedom of movement, and cooling sleep. A motion reflex layer maximizes air flow and prevents heat from building. This mattress comes in your choice of available size. Make it complete by adding the optional box spring foundation, which is offered in a choice of available sizes and heights. Size: California King.