Buy Milliard 2-Inch Egg Crate Ventilated Memory Foam Mattress Topper, King: Mattress Toppers – Amazon.com FREE DELIVERY possible on eligible purchases We get a lot of questions from people about buying a memory foam mattress toppers pad, and have amassed a lot of FAQs to try to answer them as best we can. But we thought it might be useful to have a buying guide specifically on the most common questions we hear along with what we think the key points to consider when buying a memory foam mattress topper pad. Memory foam mattress topper, helping you rest better. Mattress Toppers are laid on top of your existing mattress to add comfort and the feel of memory foam without having to invest in a new mattress. .