Casper signature cooling hybrid mattress. Specialty cool-to-the-touch fibers give an instantly refreshing feel. Phase Change Material instantly pulls heat away while HeatDelete™ Bands remove excess body heat to help you sleep 5° cooler all night long. Soothe Memory Foam conforms to the body and gently eases you into deep sleep. Zoned Support helps keep your spine in alignment with firmer foam under the hips, waist and lower back. Individually pocketed Flex Coils reduce motion transfer and boost support.