The jacket will be useful for running around when it is misty.  I have not yet tried it out in real rain, so don't know how waterproof it is.  Based on other reviews, I had bought a Large, normally I am a size 10.  The Large is too large, but might be useful with thick sweaters underneath.  I won't exchange it, but I would say that it is sized normally, not small, as I thought some reviews indicated.