I have this duvet 3 stars for the fact that it really isn't what it is advertised as being, or what I had expected it to be. "All Season" doesn't need any explanation, but the package and the Wayfair Description does so anyway. I was therefore expecting a fairly thin, lightweight duvet. This, folks, is neither. It really is a good duvet, if you're looking for something really plush. It's the middle of January in Southwest Florida, and for 2 nights it was cozy during a cold snap. I've had to take it off since, as it's just too hot. It isn't what I needed, and it simply won't work in this climate. I imagine it might flatten out a bit after many washings, but it won't fit in my washer or dryer! So nope, back it goes.
BUT... This IS antimicrobial, and I do like that feature. This may be for you if you need big and fluffy.