An umbrella is a portable device designed to provide protection from rain or sunlight. It typically consists of a circular canopy made of waterproof fabric, supported by a framework of ribs and a central pole. When opened, the canopy expands to create a shield against the elements, making it a common accessory during wet weather. Umbrellas come in various sizes and styles, including compact versions that can easily fit in a bag. They are often used in conjunction with other items like raincoats and boots for complete weather protection. Additionally, some umbrellas are designed with UV protection to shield users from harmful sunlight.