ISense : from the USA! Only with us! Genuine hybrid mattresses combine the support of high-quality pocket spring cores with the pleasant comfort of the cooling, open iSense® foam. This mattress is our bestseller and features our core technology with the added support of pocket springs. It contains the benefits of a smart bed with added cooling properties. Together with our patented Comfort Control™ technology, which provides individualized comfort and support, you and your partner will have a sleep experience that's just personal to you. Our Hybrid Premier mattress is integrated with our in-bed sleep sensor, which tracks sleep quality and provides personalized insights for a better night's sleep.