The Rear View Sunglasses Spy Specs look like an ordinary pair of sunglasses. Yet they have a unique feature… you can see behind you! The lenses on these sunglass-style specs have a special reflective coating that allows you to look straight ahead, yet see behind you as if you had a rear view mirror. When you put them on, look out of the corners of your eyes and youll see whats going on – and no one will ever know you e watching them. 
Have you ever thought you were being followed? You won need to turn your head to see whats coming up behind  you.