I am looking at my driver sit leather and I see it
significantly wrinkled - not cracked yet, but...
The car is 2004 with 48000 miles on it - how long
before I should expect the leather sits to crack?

What is the best way to extend their life expectancy?

BTW - are the sits made from *real* leather? I have
my doubts looking at the map pocket behind the sit,
which looks like just black vinyl with white foam
or cloth undercoating...