Exactly what Ruth said! Hunting clothing for women is very hard to come by but are becoming more popular. With that being said, what clothes I have seen made for women just simply aren't AS good as what's offered for men, especially when it comes to cold weather.
This however creates a new problem.... since men don't have much when it comes to hips or a butt - when trying on pants. :clown: I also have trouble finding a coat that fits my arms as the sleeves are always way too long and baggy which causes me problems when trying to shoulder my shotgun/rifle.
You just need to take her to a Cabela's, Gander Mountain or somewhere else and try a bunch of clothes on until she finds something that fits and keeps her warm! The last thing you want is for her to have a bad experience in the field because of her clothing, especially if she's never gone before. I've been there before, as I'm sure you have too and it's NOT fun. :no:
Good luck!