A kippah or yarmulke (also called a kappel or skull cap) is a thin, slightly-rounded skullcap traditionally worn at all times by Orthodox Jewish men, and sometimes by both men and women in Conservative and Reform communities. Its use is associated with demonstrating respect and reverence for God.

Why do Jews wear hats?

Most Jews will cover their heads when praying, attending the synagogue or at a religious event or festival. Wearing a skullcap is seen as a sign of devoutness. Women also cover their heads by wearing a scarf or a hat. The most common reason (for covering the head) is a sign of respect and fear of God.