Best Cooling Mattress Topper: I was going to write this post as a top 10 for you. But I decided I’ve had enough! Those posts give you great options, but how do you choose the very best of the best? There is one mattress topper that I truly feel is the best cooling mattress topper. So I’ve decided to just tell you straight out. It’s not just the materials that make this the best cooling topper, read on to find out more.