The Copper Swirl Memory Foam Mattress Topper adds more than just a layer of supportive softness to your existing bed. With its copper infusion, this topper is made to resist moisture over time for your cleanest sleep night after night. And sleeping soundly is no sweat, as this topper is swirled with conductive copper and designed with cooling comfort curves that draw excess heat away from the body and allow air to circulate, ensuring a cooler, more optimal sleep temperature.