The Serta Perfect Sleeper Elite Port Charles Plush Mattress by Serta combines the top two space age foams into one mattress giving benefits from each. With 1/2" layer of Gel Infused Talalay Latex and a 1/2" layer of Gel-Twist Infused Memory Foam, the Port Charles gives exceptional breath-ability and conformity. Also, Serta's "Smart Surface" Cool-Gel Knit Top ensures excellent temperature transfer away from your body. This mattress carries a 20 year (10 non-prorated) warranty for any impressions measuring 1 1/2" or more. The Flex-Zone coil is a breakthrough design that features a continual wire for strength, yet reduces motion by adding increased flex. This mattress is great for side and back sleepers that may have back problems or are simply looking for a more comfortable sleep.