Wind noise

[Hummertech]

If it's kind of like a buzzing/fluttering noise, it's probably the windshield pillar moldings, take it to the dealership, common thing they can fix. It could also be the upper windshield molding making noise, you can put a piece of masking tape over it and drive it. If the noise goes away, then that was it. Sunroofs themselves seem to seal very well. One other thing you can do is move your roof crossbars a little farther back. When they are right behind the sunroof it creates a lot of wind turbulence noise right there.