The Navien EQM 350 bed warming mattress topper offers precise control over the temperature of your mattress without any of the hazards of electric blankets. The quiet heating unit circulates warm water throughout the mattress pad while the mattress topper itself is durable, soft, and free of chemicals and dies. This model also comes with a Rawganic topper cover made from 100% pure cotton. Unique to the EQM 350 is the Sleep Mode, which controls the settings throughout your sleep cycle so that you can continue to stay comfortable without making adjustments yourself.