Very light and lovely
This pullover blouse is a real winner. it is soft and figure flattering, but not too clingy. the neck looks good open or closed with the small button. all in all, it's just a very good design. 
note that the notched thumb holes are completely optional. the holes disappear, without being visible, into the sleeve when they are not being used. also, the sleeve pulls down when the thumb holes are used, so there is no extra length in the sleeves (as may be suggested in the photo).