Replica Jeans

I like the Evisu jeans to a company in China, and I bought a pair of jeans, it's fine, I do not know how to distinguish between replica and jeans Authentics?
This is my new jeans
http://www.in-brands.com/Upload/PicFiles ...
Do you think it is authentic?

Price.

Knock-offs are generally decent value, where the objects are really designed for people who have so much money that they do not consider price first.

Why spend hundreds or thousands of dollars to a point where you can buy a complete wardrobe for the same price?

look at the seams, it is often at different times which is how u can say fake designer bags real