This pillow seems heavy and stiff at first, but I sink in and it feels good. One might expect it to heat up, but I haven't noticed that, so the cooling effect must be working for me. I have been known to soak pillows overnight, so that's a big deal. Oh, I also wear a full-face CPAP mask, and the pillow accommodates it and does not interfere. I don't have to let the mask hang off the side. So everything works, and I'm happy with my purchase.