I live in SW Connecticut and sleep in the European style. on a sheet with a only a duvet in its cover. I have my ceiling fan on every single night and, unless raining, my windows wide open so my room is COLD. And, astonishingly, I am almost too warm in this very thick, very soft, very wonderful beautifully made goose down duvet.
I initially had it in a thick duvet cover and had to switch it out to a thinner one.
The quality is extraordinarily good, in every sense of that word.
Alas, I may have to purchase another, lighter version for all but the coldest weeks of winter - she said smiling wickedly.
I recommend this very highly. Including the company. I called the CA number to get some help and spoke with the company owner, who was very helpful, and even though I'd ordered just before Christmas, I assured her there was no rush. But she sent it out immediately and it arrived before the holiday.
Excellent purchase and very reasonable for the quality.