I promise you, there is no hat or hood. There is a dark shadow being cast over the left side of his face/head, our right side looking straight on at him. Making things appear like something is on his head. The right side of his head "our left looking straight on" is clearly visible, uncovered, you can see he has a full head of brown hair.
This guy has benefited enormously from the blind luck of this image being distorted by a shadow seemingly cast in the perfect place over part of his head/face. He does not have a hat or hood on, he doesn't have glasses on.
I'm sorry to keep harping on this unpopular opinion but I am certain, he isn't wearing anything on his head and if you study it you'll see it also.
Instead of viewing it as a hat or hood, look at it as a shadow being cast over the left side of his head, almost looks like the state of Florida starting at the back left side of his head and pointing down almost between his eyes at the tip.
Once you realize that it's a shadow you start to see there isn't anything on his head except a head full of hair. It changes the image to a much more detailed shot of what this guy looks like.