4 minutes. 1 ... 2 ... 3 ... 4. That's how long the pillow stays cool once your head hits it. Not even long enough to fall asleep, before warming up to body temperature. Sure, if you move your head to a different spot it feels cool again ... for 4 minutes. And, Supportive? Not sure how they measured that, but it surely was not with a human's head on this pillow! Zero stars would be an accurate score, but since that wasn't an option, I'm giving it 1 star for not lying about the "gusseted" part of the description. If cool is what you really want, don't waste your time or money on this pillow. Macys USED to sell one called i-cool or iSO-cool, and it worked. Of course, they stopped carrying it years ago, and I have yet to find another one that stays cool all night, but at least some others stay cool long enough to fall asleep.