I have two sizes of these cozies for Chemex. I love them. They keep the coffee at perfect temp for an hour plus and the window view makes it easy to monitor how much coffee remains in the brewer. The styling, fit (the first time placing my brewer in the cozy was, as Blue Horse told me, was tight. No biggie!) and finish is superb. I highly recommend The Blue Horse Cozy. (Note: I added a Chemex stopper and never worry about not enjoying a hot cup during my morning routine.) Hats off to Blue Horse.