But, but, they neglected to mention which side to place towards one’s head when fabricating a shield to help prevent aliens from taking control of our brains.
Shiny side out. It reflects the beams more better.
It’s not aliens you need to worry about (except, maybe the Reptilians that run around in human form). It’s the government you need the tinfoil hats for. (Agree with the other posters - shiny side out.)