Sleep pleasantly through the night with the Comfort Tech 4” TheraGel Memory Foam Mattress Topper. This mattress topper features 4” of TheraGel premium gel memory foam for enhanced comfort. The foam’s Active Air Technology offers increased airflow and helps promote a cooler night’s sleep. CertiPUR-US certified foam featuring IsoFresh odor-neutralizing technology. Specially-sized to accommodate all standard-sized mattresses. Comfort Tech, TheraGel, Active Air Technology and IsoFresh are trademarks of Carpenter Co.; CertiPUR-US is a registered certification mark of Alliance for Flexible Polyurethane Foam, Inc.