Discover soothing and supportive comfort with the Isotonic 3” 5-Zone Mattress Topper featuring Isotonic+ Memory Foam. This topper’s 5-zone design and cool channel ventilation technology help lead you to a better night’s sleep. The plush yet durable memory foam provides enhanced pressure relief and reduces motion transfer. Isotonic+ memory foam features IsoFresh odor-neutralizing technology and is CertiPUR-US certified. Isotonic is a registered trademark of Carpenter Co.; IsoFresh is a trademark of Carpenter Co.; CertiPUR-US is a registered certification mark of Alliance for Flexible Polyurethane Foam, Inc.