An overcoat is a type of outer garment designed to be worn over other clothing for warmth and protection against the elements. Typically made from heavy fabrics like wool or cashmere, overcoats are longer than regular coats, often reaching below the knee. They come in various styles, including trench coats, pea coats, and duster coats, and can be worn for both formal and casual occasions. Overcoats are usually characterized by features such as a button or zipper closure, a collar, and sometimes a belt. They are often lined for added insulation and may include pockets for convenience. Overcoats are popular in colder climates and are an essential part of many winter wardrobes.