So far, I've only got a couple of UtiliKilts and a semi-trad (and now a casual), and the semi is definitely lighter than my UKs; I'm guessing the casual will be pretty similar. I've got a 5-Yard currently in process with Rocky, and plans for a Premier, so one of these days I'll get a little more warmth out of my kilts. At least we've had a pretty mild winter this year.