Ordinary Shirt

Ordinary shirt is a basic piece of clothing. Newcomer dwarfs spawn with it in different colors. These shirts don't grant any armor bonus and they cannot be manipulated by the player. Armors can be placed over the shirt.

Trivia
Although the dwarfs' pictures shows they didn't take off the shirt to equip the armor, and that no shirts are shown in the inventory, ghosts can still pull ordinary green shirts out of the stockpile if there is at least one dwarf wearing any body armor.

Old and deactivated recipe code lines in the game files show that the ordinary shirt is made with one rope and one fabric.