Reviews Description: If you'd like to enjoy the ultimate in sleeping luxury, this Serta 4-inch Mattress Topper will provide unmatched comfort and support. It starts with a 2-inch pillow-top layer of fiberfill that surrounds you in softness. Below that there is a 2-inch layer of premium memory foam that helps eliminate painful pressure points, and evenly distributes body weight for a restful night's sleep. Open cell technology provides a temperature neutral sleep surface for cool comfort. The result is you sleep better and wake up feeling refreshed and rejuvenated. And besides all that, you'll add years of life to your mattress.