French door design features a pair of doors that are typically made of glass panes, allowing natural light to flow between spaces. These doors are often used to connect indoor areas with outdoor patios or gardens, enhancing the aesthetic appeal of a home. The design is characterized by its elegant and classic look, often framed in wood or metal. French doors can swing open or slide, making them versatile for various room layouts. They are popular in both traditional and modern homes, adding a touch of sophistication while providing easy access to outdoor areas.