I love, love, love this jacket. I wear a medium in workout tops typically, but I ordered this in a large (thinking it would be worn on top of other items) and it fits perfectly. I think a medium would've been way to fitted.
I really like how the jacket easily transform any gym or yoga attire into an appropriate outfit for anywhere else, like running errands as well!
The jacket looks more structured and rigid than a typical sweatshirt or hoodie, but when you are wearing, it feels flexible, soft and comfortable.
For people who are often between sizes, I recommend ordering up. Otherwise the fit is true to size.
Annemarie recommended this style