Mellow's 4-inch foam mattress gel toppers are the perfect solution to instantly upgrade your old mattress! Our gel-infused memory foam mattress topper is one of our latest innovative mattress enhancers and a top-rated favorite with honest pricing and right-to-your-door delivery. Gel-infused memory foam topper revitalizes your old mattress with premium comfort and creates an ideal sleep climate without burning a hole in your wallet! As you lie down, the memory foam topper begins to conform to your body shape, redistributing your weight evenly by relieving pressure points where needed, while gel beads work to mediate trapped body heat. Gel-infused memory foam is the perfect solution for anyone looking for the balanced comfort of cooling gel and body-contouring memory foam. Our topper is also thoughtfully designed to be one inch narrower and one inch shorter than standard sizes for a perfect fit with your standard-sized sheets (topper cover not included).