For those long nights in front of the bat computer.
It’s hard to take a day off when you’re looking for whoever killed your best friend. When it turns out to not be Joker though, you might need a night to decompress and figure it out piece by piece.
That’s when Bruce puts on this comfy black Batman Hush t-shirt. Staring at the bat computer for hours on end in the batsuit can get pretty uncomfortable, so when Bruce is stuck on a riddle, he puts on a pair of sweatpants and this Hush tee to ensure he sits long enough to get the job done.