A rain jacket is a lightweight, waterproof or water-resistant garment designed to protect the wearer from rain and wet conditions. Typically made from materials such as nylon, polyester, or treated cotton, these jackets feature a durable outer layer that prevents water penetration while allowing moisture and sweat to escape from within. Rain jackets often include features like adjustable hoods, cuffs, and hems to provide a snug fit and prevent water entry. Many models are also equipped with ventilation openings to enhance breathability and comfort during physical activities. Available in various colors and designs, they can be both functional and stylish, making them suitable for outdoor activities, travel, or everyday wear.