Halloween 2026 saw some creepy get ups. Many of the most striking were highly elaborate, including Heidi Klum as a bloody severed hand, Neil Patrick Harris and David Burtka as the Grady twins and Alexis Stone dressing as Michael Jackson.

But could the creepiest Halloween costume of the year be something a lot more prosaic? A clever creative campaign hit hard over the spooky season by arguing that 'the ultimate monster costume' involves little effort and could just as easily be worn on any other day of the year.

(Image credit: Do Not Behave)

On the surface, the social campaign was designed to look like a retail ad for an online Halloween costume store. But clicking through leads to a website listing what's described as a 'Real Life Monster Costume': an intentionally average men's white T-shirt and jeans with white trainers.

While, the costume immediately stands out for its apparent mundaneness, things take a turn in the description of what it includes.…