Inside the Dream: Our hybrid mattress pairs responsive foam with traditional encased coils. Designed with a gooey-medium feel that's perfect for any sleep style, especially side sleepers. Best Solution For: Tossing and turning. Features a top layer of Breathe Flex Foam that's both responsive and breathable to soothe you to sleep with the perfect bit of bounce. Engineered with ZonedSupport to keep your spine in ergonomic alignment with firmer foam under the hips, waist, and lower back. Individually pocketed Flex Coils flex to your body to reduce motion transfer and boost support. Our most breathable Breathe+ comfort layer provides 20% more airflow than Breathe Flex Foam.