Window visors, also known as rain guards or deflectors, are accessories designed for vehicles. They are typically made of acrylic or polycarbonate materials and are installed above the windows. Their primary function is to allow fresh air into the car while keeping rain and wind out, enhancing comfort for passengers. In addition to improving ventilation, window visors can also help reduce glare from sunlight and protect the interior of the vehicle from UV damage. They come in various styles and colors to match different vehicle models, making them a popular choice among car enthusiasts and everyday drivers alike.