No matter how much deodorant we use, it’s challenging to hide the signs of overexertion. Armpit stains and back perspiration are all too visible under the fluorescent lights at the local gym, as our T-shirts and tank tops take on a two-tone shade of sweaty and dry.
But why is fabric darker when it’s wet? You might resent that clothing manufacturers haven’t solved the issue yet. However, it has nothing to do with the makeup of the T-shirt itself. Rather, it’s a matter of how the eyes perceive light and how some wet objects refract light differently than their dry counterparts.
In reality, wet fabric isn’t actually darker than dry fabric. [...]