Ok
Just received today and when I first tried it, it was cool. However after just a short time the coolness left and it was actually acting like a heat sink and absorbing my head's heat. It was then warm to the touch and not cool. I did not try it refrigerated yet. My guess is that the coolness will last longer but the same problem will result. Also it is very small. I am also trying a chillow pillow right now and it feels great!! I will order 4 more of these.
Rating: 3 stars