Quoting from [yarenimex]:
Jeans are very common clothing in daily life for almost every age group and gender. Jean clothing is produced with the denim fabric.
Is there any other use of denim fabric apart from clothing ?
What is the importance of the denim fabric in textile industry ?
Yarenimex
Denim fabrics:you can go to the website
http://en.wikipedia.org/wiki/Denim
get better details: he cannot tell all here: so you can learn a lot from there