While our sublime foam topper can give you a delicious extra layer of comfort on top of your mattress, we can’t claim that it will make your mattress softer. That’s because the feel of our topper on your mattress totally depends on your mattress underneath it. And seeing as our topper is made from foam, it’ll mould to the shape of your mattress over time, too. Something to bear in mind if your mattress had a dip or sagging.