On MARS the current year's t-shirt design is worn on Thursdays and Fridays and there are no restrictions on pants. On Saturday everyone is required to wear black pants, a white dress shirt, and a standard bright red tie (tucked safely into the shirt while in the pits
). Red fedoras and red/white knee-high socks are pretty standard but are not required. All in all it gives the team a very distinctive and professional/memorable "look."
-Luke