Mattresses should last 8 to 10 years. If you've had an uncomfortable bed for less than that, a mattress topper can reintroduce comfort to your sleep. Mattress toppers are great for softening a bed that's too firm, increasing motion isolation, and, in some instances, introducing cooling features, but if your bed is sagging, lumpy, or no longer supportive, a mattress topper is only a bandaid fix. If your bed is older than 10 years, look for a replacement in our best mattress guide.

It depends on your sleep needs. Down mattress toppers are plush and cushy, which is best for those who prefer a soft feel. On the other hand, memory foam and latex are both firmer materials with more support. Latex tends to be cooling, but you can also find special cooling memory foam mattress toppers as well.

A mattress topper can significantly alter a bed's feel and is typically made of foam or latex. Many mattress toppers are between two and four inches thick and sit on top of your mattress. Mattress pads are usually filled with down, down alternative fibers or wool and add a thin plush layer to your bed, but won't necessarily add more support. They go over your mattress like a fitted sheet and are usually easy to wash and can protect your mattress from dirt and extra wear and tear. Though for waterproofing and protection from bedbugs, dust mites, and dander, you'll want to use either along with one of the best mattress protectors.