To continue with my speculations, Barbera is a product of northern Italy, acknowledges English influences, and therefore usually includes flannel in his lines. Kiton and Attolini are products of Naples, where flannel is a punishment in the heat. Perhaps this is why you so rarely see these lines carry flannel (have never seen one on "Worlds Finest" Ebay store). Alan Flusser,in all his books, still touts seasonal wardrobes. But he is a not-so-secret admirer of Brooks Brothers in the '60's, where "tropical", linen, and seersucker vanished from the shelves in September and "year-round" was unknown. Yes, most top-end New York stores still carry heavier weight suits, but it takes money and an interest in style (especially, retro style) to avoid the less costly "year-round" wardrobe. Sorry for the length of this.