The Tallis is a Jewish prayer shawl. Men at morning services traditionally wore the prayer shawl over the shoulders. It was made of silk or wool and usually had blue or black stripes at the bottom. The fringes at the four corners contain a proscribed number of knots, as a reminder of Jewish law. A Tallis was often presented to boys at the age of 13 on their bar mitzvah, and is also a part of most wedding and burial ceremonies.