Makes our ultra firm mattress soooo comfortable. We were both waking up with aches and pains, tossing and turning all night for over a year with our new mattress. It’s just too firm. I tried a down topper but it did nothing. This foam topper is perfect. I wake up in the same position I fall asleep in. Before I would wake up to reposition multiple times a night. My hips and back were always achy too. This topper is worth it and reasonably priced!!