An old mattress is not always a bad mattress. However, after a few years, no mattress stays as good as it was when it was bought.
But in some cases, people choose to keep their old mattresses, even if they aren’t nearly as comfortable as they were in the past. The solution to keeping a mattress as comfortable as possible is buying a mattress topper every once in a while. Since comfort is the key, a memory foam mattress is the most recommended solution. Whether if you choose a thinner topper or a thicker one, any of them would considerably make a difference in the comfort provided by the mattress one sleeps on. Prices are very affordable, taking into consideration the fact that the difference felt during sleep will resemble sleeping on a brand new mattress, so getting a topper is a great idea, regardless of the type or thickness you choose, as long as it’s memory foam.