Linen speaks for itself. cool/hot as needed. I have had duvet covers in the past and found that the button closures work less effectively when there down from the top about 10 inches or so. they show the inside down comforter and come undone more easily, then the ones that button right at the top. This feature is much better and I was pleasantly surprised to see this duvet set done this way. you can easily grab the top and comforter inside and shake it down back in place in one step. Wrinkles, yes, but it seems to work with town/country feel linen bedding provides.