Nappa leather is a type of high-quality leather that comes from the split hide of an animal. It has a smooth and soft texture, making it highly desirable for use in various products such as shoes, bags, and car interiors. Nappa leather upholstery refers to the use of this premium leather material on the interior surfaces of a vehicle, including seats, door panels, and dashboard. It is known for its luxurious feel, durability, and ease of maintenance compared to other types of leathers or synthetic materials used in automotive upholstery.