Tesgin

I purchased a Gore Phantom 2 Windstopper jacket. Haven't used it yet cuz I think I might return it. I'd like some input. From what I've read, this thing gets consistently amazing reviews (breathability, warmth). It's supposed to be a form-fitting, rather tight fit.

I am finding the thing is as baggy as all get-out! I ordered a large. WAY too baggy. Replaced it with a medium. It looks great when I'm standing erect, but when I lean over (as I would if I were over my handlebars) I get two BIG loose bulges across my chest. Both are easily 4-6" from my chest. Apart from looking unsightly (makes me look fat, like I have bulges all over my waste!), there is a lot of air space across my chest. Huge pockets of air from the folds.

So my question is, how much does that bulging, loose-fitting material compromise things in terms of warmth? How snug should it be? I've tried on Castelli stuff. Fits like a charm. THIS I'm not pleased with. But I've never heard anyone comment on this at all. Am I the only one?

Thanks in advance,
Tesgin