The Bear Pro Mattress Topper is a 3-inch copper-infused memory foam topper that adds a layer of cooling, contouring pressure relief on top of an existing mattress, while helping protect and extend the life of the bed beneath it.The copper-infused memory foam cradles pressure points and helps draw heat away from the body, while a premium circular knit cover delivers cooling on contact and zips off for machine washing and a more hygienic, hypoallergenic sleep surface. The foam is CertiPUR-US certified. 3-inch copper-infused memory foam Cooling, removable, machine-washable circular knit cover Adds pressure relief and protects the mattress underneath CertiPUR-US certified foam It's a good fit for sleepers who want to make a firm bed feel softer and cooler without buying a new mattress.