The Westbourne Gel Hybrid FirmThe firmest of our three Gel Hybrid mattresses. The cool sleeping surface only gel can give, with the deepest support layer underneath. Gel hybrid is what we'd recommend to anyone who runs warm at night, has tried memory foam and found it claustrophobic, or sleeps next to a partner who heats up the bed. The gel infused foam comfort layer draws heat away from the body and disperses it, so the surface stays cool through the night rather than warming up