You may not think that metal belongs in your mattress topper. But here at Zinus, we’re in the business of making seemingly unremarkable materials, well, remarkable. The Copper Cooling Swirl Memory Foam Mattress Topper is a match made in sleep heaven, featuring our old faithful, cradling memory foam along with our newest addition to the family –copper microparticles. Believe it or not, copper can do some incredible things for your sleep, like killing harmful bacteria on contact, and absorbing your body heat as you snooze. So sleep like never before, all thanks to one simple, not so ordinary ingredient.