The Beautyrest Silver Bold Extra Firm Mattress offers a firm sleeping experience. It features conforming back support and motion separation for undisturbed sleep. A soft open cell foam delivers high airflow helping to keep you comfortable during sleep. A fiber enhanced with silver designed to help move both heat and moisture away from the surface of the mattress to maintain an ideal sleeping temperature. A soft, supple fiber enhanced with silver to prevent the growth of stain and odor causing bacteria, and mold and mildew to help keep your mattress fresh.