This jacket  is NOT a rain jacket and barely considered a windbreaker.  It is touted as "water resistant", and yes the fabric is highly water repellent, but the numerous unsealed seams on the shoulders and elsewhere and the exposed zipper allowed water to soak through in a downpour.  Even as a windbreaker it's mediocre because you cannot close the back shoulder vent so when the wind is at your back it blows right through you.  As for the fabric being breathable, I'd say it's more breathable than a plastic bag but it falls way short of something more sophisticated like Gortex.  I found it trapped a lot of condensation.  There are no vents in the armpits.

On the up side, it's lightweight and packs small, has a concealable hood, is cut large enough in the sleeves to fit over a fleece jacket or sweatshirt, and does shed light rain/drizzle.  And it looks good.  But don't be mislead in thinking it's truly a rain jacket or windbreaker because it isn't either.  It's just a cheap, "better-than-nothing" jacket to bring along on a day trip or keep in the car for occasional use.

I'm really disappointed by Columbia's products moving towards form over function the past couple years.  This jacket is a glaring example.  Maybe they'll make the 3rd generation of this jacket better.  Or not...