This jacket is wonderful. Given that the streamlined seams of a small is a perfect fit for my 5'11'' 75kg frame, I wager that Swix runs a bit large, but no so much so that I can fit a fuzzy mid-layer underneath. The water resistance of this garment is secure: I've been out running/skiing/biking in conditions from pleasant mist to healthy sprinkler and have felt no wetness to complain. It also boasts a surprisingly classy appearance for technical gear, which was unfortunately its undoing; my decision to wear it out on St. Paddy's day made some Guinness swilling clepto aware of how great it is. This replacement arrived promptly.