I really  like this jacket .. it's thinner then my other north face jacket and that worried me but then 5 mins into it outside it was great!  That fleece inside  is really  warm. I'm female  105 lbs 5'2 i ordered a medium  it fits snug but a bit long but small would have been  too tight ... i can wear  a sweater but that's it and that's all I need and I run cold. I don't  think it would  be enough  if your going to Alaska but it works really  well in 30 degrees.. the fleece sheds it leaves little  pieces all over the place so I'm constantly  brushing  off my shirt and jeans.. very professional  looking especially  with the detached hood removed.. I just don't  like the pockets they are flat across  I like more angled and there is only one small secret pocket.. but that's it I still love it thank you