Here is a cycles leather shader based upon the Principled BSDF shader included in 2.79.
What you see is what you get:
There isn't any changing of settings to be done on your end, the product you buy is the exact same .blend file the renders were made with.
The overall shader is based on principled BSDF, blenders PBR shader. In other words, this leather material will look the same across various lighting conditions.
Easy Artist Control:
The shader comes with enough customization to be versatile without needlessly adding to the complexity.