Window visors are accessories installed on vehicle windows to enhance comfort and functionality. They are designed to deflect rain, wind, and sunlight, allowing drivers and passengers to keep windows slightly open for ventilation without getting wet or uncomfortable. Typically made from durable materials like acrylic or polycarbonate, window visors come in various styles and colors to match different vehicle models. They are easy to install, often using adhesive tape or clips, and can improve the overall aesthetic of a car while providing practical benefits.