Bought this so I would have something lightweight and sleeveless with pockets that I could wear to the fitness center. To me, it runs small. I can wear it but it zips up snugly. Would size up if I bought another one. Of course, that can also be attributed to the material; kind of stretchy scuba-like in order to be water-resistant. Which makes it kind of warm to wear even in the mornings. I'd still recommend it.
Rating: [4 of 5 Stars!]