This unique topper from LUCID features a 2-inch down-alternative layer coupled with a 2-inch gel memory foam layer, combining to provide a 4-inch comfort upgrade. The down-alternative fiberbed is made of 100 percent cotton, is machine washable, and dryer safe. Meanwhile, the gel-infused memory foam layer is ventilated and hypoallergenic, offering contouring support while helping regulate body temperature.