This half zip runs pretty true to size, I went with a medium and is not uncomfortably clingy but just right. I like the thumb holes in the sleeves to keep my sleeves from rising and also keep my hands a bit warm when running. I still layer a shirt underneath but by the end of a short run, I'm usually quite warm and comfortable. I like to pair this with my lite show tights as shown on the model, they're great compliments that look good together.
Rating:

[5 of 5 Stars!]