Casual for the chilly season (as in here). Cashmere zip and…long cashmere socks.
Italian flannel by Drapers with a soft finishing, blended with cashmere and a 50% heavier, typically English, pure wool flannel by JJ Minnis. Now who wins certainly depends on the climate one wears the stuff in and of course preference. Of course the pure weight and finishing of cloth is the most obvious sign of climate-related provenance of a garment, but of course it’s also subtle differences in construction. While the canvas in quite a few Southern Italian overcoats (even on more formal and seemingly more “constructed” pieces) does not extend along full length in order to remain slightly softer and lighter, north of the Alps most overcoat are actually made to keep the wearer warm instead of adding a merely decorative layer on the suit for a few months.