A lightweight coat is a type of outerwear designed to provide warmth without the bulk of heavier jackets. Typically made from materials like nylon or polyester, these coats are ideal for mild weather or layering. They often feature a simple design, making them easy to pack and carry. These coats come in various styles, including windbreakers, trench coats, and bomber jackets. They are popular for outdoor activities, travel, and casual wear, offering protection against light rain and wind while remaining comfortable and breathable.