Allswell offers a few topper options that are worth a look, but I’ll go ahead and call the 4″ CoolTouch Topper the winner in my eyes. This one comes with all their bells and whistles – premium foam with graphite and copper gel to help regulate temperatures. While this is their top-of-the-line, it still comes at a reasonable price compared to many other competitors. Their two lower models actually feel really nice too, but for not very much more, you can get their the upgrade. Enjoy!