A Staple!

Im 5'8 145 lbs, ordered medium. I'm broad shouldered with muscular arms and I did not have any issues with the arms being too tight like a few other reviewers mentioned. This fits perfectly well over a tank top, and I layer a windbreaker over top. I will be using this often for chilly adventures and this will also be good to sleep in when camping on chilly nights.

Runs Small

Love the fabric and color, but this jacket fits smaller than other OR products in my size. The hood also seems to be a strange shape on my head, especially when I try to use the ponytail hole. I'll keep it, but can't wear layers under like I planned.

Pretty snug for a medium. It does say "slim fit" in the description. I was kind of expecting it to be a midlayer but will definitely only fit as a base layer. The other item I purchased in a medium from here was a bit big on me. Wish I would have sized up! Overall it seems like a really nice product however it's a bit constricting because of the size.

Biceps Beware!!

Upper sleeves Too Tight! Returned it. I'm a good fit in OR Medium. But this item strangled my biceps. Lots of fit active women have some volume in their upper arms - get with it!

Perfect Ski Base Layer

This shirt is SO warm and comfortable. The built in hood/mask is great. I wear it as my base layer skiing and it keeps me cozy, and covers my mouth / nose perfectly. My only complaint is the sleeves are a bit long so I fold them back for under my coat.