Rated 3 out of 5 by Pinyon from Not as warm as I expected This was the highest fill power I could find in a quick search online, but I'm not that impressed by the warmth. My husband and I bought this originally for our (drafty) second home high in the mountains, but I'm not sure it will cut it. Currently we're sleeping with it in our urban condo with a percale cotton duvet cover over the comforter and a flat sheet over that. We allow the temperature to drop to 62-65 F while we're sleeping, although I can see last night it remained 68.5-71.6 F. But we do not overheat! I sleep cold, but my husband sleeps warm and can still wear pajamas with this thing. I was looking for something that basically required cool nighttime temps. This is not it. Wish I had gone with synthetic and more fill power.