Mountain Hardwear Transition Jacket - Gore Windstopper® (For Women)

This jacket is a truly amazing windblock. Incredibly lightweight and soft-- you'd never think it could keep the wind out so effectively! I bought the orange, which is perhaps a little brighter than the image appeared on my screen and runs slightly toward the red end of orange rather than the yellow end. It's a decently visible color for cycling, but is certainly not the high-vis safety orange.

About fit: This is, as others have noted, a close-fitting item. I'm 5'4", 125 lbs with about a 37" chest. I bought the medium and it fits well and is flattering, but it would be a little tight with anything heavier than a wool shirt underneath. That being said, this jacket could also go under a fleece, I think, as a windblock layer. It's brushed on the inside, so it's soft against your skin. Sleeves run a little long, which is nice on a bike, and the cuffs are pretty tight, so don't plan to be able to push up the sleeves.

When I'm riding, I do work up a bit of a sweat inside the jacket, but it doesn't seem to get especially clammy or cold and it dries right out again afterward.

And yes, it has only one pocket, which is really just for an mp3 player. Another might be nice, but would add bulk to what is really a minimalist, highly technical piece of gear.