Shirts are a type of clothing worn on the upper body, often with sleeves and a collar. They come in various styles, such as dress shirts, casual shirts, and T-shirts, and can be made from different materials like cotton, linen, and polyester. Shirts are versatile, suitable for both formal and casual occasions, and can be paired with pants, jeans, or skirts. They are popular worldwide as a comfortable and stylish clothing option for all genders and ages.