Joanne C.wrote a review of Arc'teryx Atom SL Hooded Jacket - Women's on July 30, 2018
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
I just received my Arc'teryx Atom SL Hoody and it is BRILLIANT! Lightweight and trim-fitting but warm. I bought it in the green "Creekside" colour and love it! I'm 5'7" and 140lbs and wear a 36C bra. Medium fits perfectly with enough room for a light base layer underneath, but if I wanted to layer more under it then I'd need to size up to a large - especially to have enough room through the chest. It's nice and long in the sleeves for my longish arms. Wore it outside on a 10°C (50°F) day with a cool wind and only a singlet and shorts and it felt light as a feather yet warm and nicely wind resistant.
The material is wonderfully soft and stretchy and it's cut well so you get great freedom of movement through the arms. Dropped hem in the rear keeps your lower back and rear nicely covered. Hip length in front. Looks and feels GREAT!