Underwear
Judaism. Some types of Jews wear a prayer shawl (a piece of cloth wrapped around the shoulders) called a tallit katan. It has four corners which have tzitzit (fringes) attached to them. Because people who are not Jews do not usually walk about wearing prayer shawls, a Jewish person will often wear a tallit katan beneath a shirt so that it cannot be seen. However, as the shawl is not supposed to touch the skin, an undershirt is worn under it.