Saddle soap also helps maintain the leathers PH so it doesn't dry out.
Any saddle soap will work, I use a liquid spray type application cause it is easier.

 

One product I have had real good results with is Meguiars Gold Class Leather conditioner/cleaner.

Used it on my Benz 420 SEL and Porsche 928. It is great for high end leather and will recondition without harm or unwanted side effects. Try it you'll like it