I bought four heated jackets. Tried them all on. This one by far was the best quality, price and style! Battery included too! I get lots of compliments on the style. As for the sizing, the XS is a good fit. I’m 5’6” 120-25 lbs and I can fit a bulky sweatshirt underneath and still feels comfy. I tend to like loose fitting clothing. I would say the XS fits more like a Small but again I like the oversize fit better. Some of the hoods look funny when you have them on but this one looks good and is shaped nicely. As for the heaviness… in comparison, it is thicker and warmer than the other ones I tried on… thereby, it is a bit heavy. I definitely recommend this jacket!