Twin-Sized Mellow 4 Inch Egg Crate Memory Foam Mattress Topper With Infusion. Mellow's 4-inch bamboo egg crate memory foam mattress toppers will instantly upgrade your mattress. It's the memory foam you love infused with bamboo, which is known to naturally help organically control odors and absorb excess moisture to bring you longer lasting freshness. Memory foam is well known for its body contouring features and pressure relief comfort throughout your whole body. Once you lay down, our memory foam toppers will start reacting to the temperature of your body and begin to mold itself to your shape, evenly distributing your weight. The egg crate memory foam structure is designed for better airflow while providing a customized level of support. Combined with our pressure relief system, you will enjoy total relaxation with ultimate support in key areas including the head, shoulders and hips. Memory Foam 4-inch egg crate topper with increased airflow Amazing pressure relief comfort with body-conforming memory foam Bamboo infusion helps control odors and moisture for fresh sleep Responsive active suspension isolates motion to provide undisturbed sleep for you and your partner CertiPUR-US certified memory foam, 3-year manufacturer's warranty Product Note: Please allow up to 72 hours for the topper to rise