Dude Clothes are the everyday clothes that the Postal Dude wears. The outfit consists of a trench coat, alien t-shirt, sunglasses, jeans and boots. When any other outfit is worn, the Dude clothes are put into the player's inventory (and can be dropped like any other object).
On Wednesday, after being put into a Gimp Suit by Rednecks, Postal Dude is forced to find a change of clothes before returning home, and suggests the Money Shot Laundromat. The Dude may meet the task requirement with any set of his own clothes.