What Is Maggie Gyllenhaal Wearing?!?

I admit that I have been known to step out in clothes that are a bit too comfortable.  I work at home and most of the time nobody sees me during the day other than the cat, but what is Maggie Gyllenhaal's excuse?  The Oscar nominated actress hit the streets in New York City over the weekend in what appears to be her pajamas. 

Photo: Pacific Coast News