Topper”, as its name tells, is something you can put on your existing mattress and enjoy a rich sleep leaving you all revitalized in the morning. It’s a kind of convertible option for your bed, by changing it into something that provides pressure relief, prevents from morning soreness, lessens tossing and turning at night, and relieve body aches—in short, giving you all that it takes to get a decent night’s sleep.

 

Memory foam toppers will certainly help, some of the cheaper ones are only 1 inch thick but will still make a difference.
You may find that you get hot during the night as they seem to either generate or hold in warmth, although this may not be a bad thing.
Go for the best quality you can afford.