10" thick with 2.5" Gel Infused HD Memory Foam Comfort layer, 2.5-inch Memory Foam Support Layer, and 5" foam support base * Millions of Cool Gel Particles are infused into the HD Memory Foam Layer to keep the mattress cooler and more comfortable than regular memory foam * Conforms to the curves of your body for greater pressure relief and proper spinal alignment * Reduces tossing and turning, eliminates motion transfer, and provides a great nights sleep. Naturally anti-microbial, hypoallergenic, and dust mite resistant. * Mattress compressed and rolled for shipping -- easy to carry and saves you money on shipping costs, 25-year warranty