The Malouf Travel Contour Gel Dough™ + Z™ Gel design correctly supports the natural curves of your head, neck and shoulders, providing ideal support for flights, cars, or buses. The liquid Z® Gel lies on top of the pillow for a cool sleeping surface that will capture and dissipate your body heat, creating a cooler sleeping surface. The memory foam is also infused with Z® Gel for a combination that offers an optimal thermal experience. The unique Gel Dough® memory formula creates a softer, cooler, doughier memory foam. The extremely breathable bamboo velour cover enhances the cooling effect, and is removable for easy laundering.