A shirt is a garment worn on the upper body, typically having a collar, sleeves, and a front opening with buttons. It comes in a variety of styles, fabrics, and fits. A classic dress shirt, for example, is made of crisp cotton or a cotton blend, features a structured collar, button cuffs, and is tailored to fit the torso closely. Shirts can be long-sleeved or short-sleeved, plain or patterned, casual or formal, and are often worn tucked into pants or skirts, or left untucked for a relaxed look