It's hard for celebrities like Chris Evans, Shia LaBoeuf, and Miss Cellania to go out and enjoy their daily lives without photographers from gossip rags shoving cameras at them and snapping pictures. They often want to just be left alone while in public, which is why Chris Holmes, a professional DJ who often works with celebrities, invented Flashback Photobomber clothing.
Tiny glass bubbles embedded in the clothing are invisible to the naked eye. But they flash back at cameras using flash bulbs, ruining the resulting images.
-via American Digest
It would probably would look more like the link below in reality:
http://i.imgur.com/i0HJIcG.jpg