A waistcoat is a sleeveless garment worn over a shirt and under a jacket, typically as part of formal attire. It is often made from various fabrics, including wool, cotton, or silk, and can come in different styles and colors. Waistcoats are commonly associated with men's fashion but can also be worn by women. Traditionally, waistcoats feature buttons down the front and may have pockets. They are an essential component of outfits like suits and tuxedos, adding a touch of elegance. Waistcoats can also be worn casually, often paired with jeans or chinos for a smart-casual look.