The greatest scientific advancement in the industry since memory foam, phase change material (PCM) offers continual temperature regulation for ideal sleep comfort. Our proprietary application of OmniPhase™ microencapsulated phase change material has created a new category in memory foam comfort. PCM continually adjusts to body and environmental temperature to maintain the optimum sleep temperature range. Supportive memory foam is infused with graphite - known for its excellent thermal conductivity properties - to remove heat. Tiny graphite molecules in the pillow create pathways that use conduction to channel heat away from the head, face and neck. A Tencel® mesh cover creates a soft, smooth surface that helps to control humidity while allowing for maximum exposure to the the Omniphase™ coating. We maximized the most advanced pillow-cooling technology available to create ideal comfort. Tencel® Stunningly soft and smooth Tencel® botanical fiber has inherent moisture management properties that make it ideal for sensitive skin and temperature-sensitive sleepers. Graphite With its enhanced thermal conductivity, graphite infused in memory foam creates a pathway that naturally moves heat away from the body. OmniPhase™ Phase Change Material Microencapsulated phase change material continually absorbs and releases heat as needed to maintain the optimum sleep temperature. Zoned Technology™ Zoning creates the perfect combination of comfort, support and airflow. Larger holes in the center of the pillow cradle your head, while smaller holes around the perimeter create a supportive zone for your neck.