Versatile jacket - Arc'teryx Atom AR Hoody - Women's

I bought this for my gf and she loves it. Lightweight and warm enough. Great in between jacket. She wouldn't wear it under 35 degrees unless she had a shell. It's very trim fit and flattering. But size up if you want to layer. She's 5'5 120 and I got a Xs but it's probably just good with a tee underneath.