Leather! If you take good care of it with cleaner/conditioner it stays nice for a long time.
I have to credit modern-day cloth seats though. Manufacturers are starting to use some really nice materials. If I didn't enjoy or have time to detail my car I would definitely choose cloth.
I have to credit modern-day cloth seats though. Manufacturers are starting to use some really nice materials. If I didn't enjoy or have time to detail my car I would definitely choose cloth.