It depends how tightly the belt is tied.That presumed Rorshach in that silhouette has a too narrow waist though, you don't have that in a duster.
https://images-na.ssl-images-amazon.com/images/I/418ugyiUZWL._SY445_.jpg
http://orig12.deviantart.net/0dde/f/2009/302/0/8/rorschach_by_night__wind.jpg
NRS also puts their own spin on these characters, so if it's Rorschach, he might be a bit thinner than usual and with a different looking coat.