Mauricio Carneiro wrote a review of Santini Wind Stopper Jacket - Men's on April 12, 2010
48ºF outside. I went out wearing just this over my gym shirt (breathable thin). Loved the ride, kept me really warm. My face was the only one feeling the cool wind.
Definitely runs a little large. I never bought anything other than large, but I went XL with this one and got the perfect (very snug) fit.