Why is there a stitched hole in the back pocket of my new jersey? I just finished a charity ride and found that the brand new jersey bought for it has a hole in the back center pocket.  It is neatly cut, with stitching around it to prevent fraying, so I'm sure it is a feature rather than a defect.  What is the intended purpose?
My best guess is the hole would allow a headphone cable to run down the collar, through the inside of the shirt, and into the pocket.