Hi,
I snowboard and know what she means by not puffy! I like the same trousers - I assume it would be similar for skiing.
Basically, the 'puffy' ones are where there is extra padding in the leg and the skinny ones are where there is no padding, and the material feels a lot thinner. I know these ones are expensive but they might give you an idea of what you are looking for. In my experience Burton do good ones but they can be on the pricier side but at least you know what you are looking for!
http://www.burton.com/default/indy-snowboard-pant/W15-130711.html?start=4&cgid=womens-pants
A HA! I get it now! THANK YOU!!! I kept thinking she meant those lycra leggings which do not look warm enough. These look perfect! THANKS!