Medium-firm mattresses are very popular with consumers. On a 1-10 mattress firmness scale, they are between 5 and 7. This type of mattress usually does not contain thick memory foam, but is made of pure foam, or a little memory foam plus high-density foam, or a combination of foam and springs. When lying on this type of mattress, it usually does not feel too hard or too soft, which is suitable for most consumers.