T-shirt is a type of casual shirt that is typically made of cotton or a cotton blend. It features short sleeves, a round neckline, and no collar. T-shirts come in a variety of colors, patterns, and designs, often printed with graphics, logos, or text. They are lightweight, comfortable, and versatile, making them a staple in casual wear for people of all ages and genders. T-shirts can be worn alone in warm weather or layered under jackets, sweaters, or hoodies in cooler climates. They are available in different fits, including slim, regular, and oversized, catering to various style preferences.