Interior trim (dashboard, console, doors, etc.) consists of a combination of vinyl, plastic, rubber and leather, which can be cared for with many of the same products, so there is no need to get a product for each material.
Leather seats are one of the first things we notice when entering a vehicle and dirty seats not only look bad but it can harm the long term health of the seats. Modern day leather can be comprised from a variety of natural and synthetic materials. Very few vehicles actually use just raw leather and many of them have a coating on them to help protect against wear and tear. All of these material are prone to drying out and breaking down over time so regular maintenance is essential.