If you make your bed, you’ve gotta lie in it, but a mattress topper can help make it a more pleasant experience. These pads sit on top of the mattress, adding an extra layer that can fundamentally change the feel, making it firmer, softer or just helping to smooth out bumps and lumps. None of these products can fix an old and broken mattress: if the springs are shot or there is a dip in the mattress the shape of a long-dead relative, you may need a new mattress. But if you are stuck with a mattress that is too hard or too soft, adding a mattress topper can make it juuusssst right.