Heed the Call
You know, the City of Gotham could probably save a lot in electricity bills not having to fire up that megawatt searchlight.
If you're like us, you've had to take your cell phone into the shower with you when you were on-call. Well, not into the shower. As close as possible without getting it wet. You perch it on the edge of something. You mute it. You turn up the volume really loud and then soap up as fast as humanly possible and hope nobody on the call asks a question only you can answer until after the shampoo's out of your eyes.
Batman was on-call 24 x 7 before cellphones even existed. We wonder. Did he have to stay near a window? Batcave doesn't have windows. But, of course, at home he has the red phone. But surely occasionally he needed to go search some dusty archive in a basement someplace and just prayed Commissioner Gordon didn't need him for the next 5 minutes.
Batman sees the Batsignal shining in Gotham's sky on the front of this 50% cotton / 50% polyester blend shirt. The back of this shirt is plain white. Imported. Machine wash cold. Tumble dry low or lay flat to dry.
NOTE: Because of how this shirt is printed it is likely that there will be some small gaps in the printing around the neck and sleeves. This is a normal artifact of the sublimation process. If you don't like the one you get, however, you're welcome to return the unworn shirt for another one. Each will be unique.