I absolutely love the look of this shirt with the built in layering piece. the overall garment is lightweight and not too heavy even with the added layer. however; this runs really large. in general, this brand runs large for me and i would say that if you are used to this brand, you can stick with your normal sizing for this brand. however; compared to other brands it runs very large. i think it would work fantastic for me in a different size. it is not at all fitting so it would be more like a