Has anyone used this for running? I'm...
Has anyone used this for running? I'm wondering if it will be breathable enough since there's no zip vents.
Also, I'm 5'5" and 120 lbs. Would a Small be sufficient if I want to layer a fleece or hoodie?
You should definitely be able to fit a fleece underneath. I have the small, and while I am only 5'3" and 105 lbs, I can fit a pretty thick jacket underneath with no problem, so you should definitely be able to fit a fleece. As far as breathability goes, it should be good on cooler days. On warm days the jacket is a bit too hot to run in, but its a lot more waterproof than a regular "water resistant" running jacket.