What it is, is a awesome pair of jeans that solves a problem most people will probably recognize. Today, phones have become more important than ever, and what is it you do with important things? You keep them as close as you can. Basically this jeans helps with that. Not only is your beloved iPhone always close to you, you don't even have to take it out of you pocket!
Why this is cool is because like I said, it fits the time very well. This jeans gives some comfort and looks good at the same time. People are always looking for things that make their lives more easy and this things helps for sure. Also it gives the sense of security by making it easy to check if your phone is still in your pocket (and well). All these things just make live a little better!