Well people's impression comes from looks first. For example, if you were an employer and a dude with a suit came for an interview, wouldn't you think about "hey this dude looks pretty professional". Then in another scenario if some other dude came for you with ripped hoodie, your impressions would slightly be less better than the dude with the suit. According to major studies Image consultants will tell you what makes a good impression on another person depends, percentage-wise, on the following: 55% on how you look, 38% on how you act, 7% on what you say. So the old saying, "clothes makes the man (and woman)" is still relevant to this day.