When washed, the shirt revealed this message:
"If your T-shirt can do it, so can you.
We'll help to free you from right-wing extremism."
They doubt the shirt stunt will immediately change anyone's views, but it has provoked discussion and media coverage.
One member of an online neo-Nazi forum said: "Why didn't we think of that?"
The initial unwashed image said
"Hardcore Rebels - National and Free"
Tee'd Off.Right-Wing Extremists Tricked by Trojan Shirts, Spiegel Online International>>
Exit Deutschland (English translation by Google)>>