The red button-down is one of Kirk Weiler's signature shirts, often worn during his video series. It is a plain, crimson shirt with a classy collar and an eye-catching hue. While the red button-down can be seen from time to time in Kirk's videos, is isn't seen early as much as his classic grey and black shirts. It has been worn by Kirk in various styles, from all the way buttoned up to a more casual, unbuttoned look. Click here for a great example of the red button-down in action.