There are a few things to consider when buying a memory foam pillow. Think about whether you prefer a firm or soft pillow and the thickness of the cover. In addition to this, there's also the material and size of the pillow that you need to consider. On top of all this, there are many other memory foam pillows on the market that are not so great. So you need to remember that you cannot just pick any memory foam pillows, but you need to find the best quality of it.