Rest easy knowing this HD Super Duty mattress will perform soundly, night after night. This collection integrates an advanced support system with comfort layers that will mold to the shape of your body. Cooling gel and plush quilting adds extra pressure relief and more airflow throughout the mattress. The silk, wool, and cashmere blend regulate temperature and wick away moisture. Heavy duty spring design provides the strongest support system to ensure support across the surface for proper spine alignment. An extra layer of comfort is provided by the extra euro top layer. Rest assured of the quality of this mattress.