"Club suits" on, as well as gloves of the type used in MMA matches. Faces smeared with Vaseline to limit damage.
The setup is "judges" and "paramedics" in place on some lonely patch of grass far outside town with two "teams" that collide - to beat and kick each other.
Then shake hands and thank them for "good match".
The phenomenon has for several years been common among certain groups in the stands of the big football clubs, and on Wednesday the Gothenburg district court announced the verdict in a high-profile legal case.
It revolves around a 35- and 30-year-old man who acted as leading figures for the IFK Gothenburg-linked Wisemen and its "youth group" GYF. They have been charged with assault and the older of them also with the crime of involving a minor in delinquency, which became punishable in 2023.
Four boys in the same case, today 19 and 20 years old, were charged in turn for various cases of assault in connection with "boxing" - they call the group fights that - in Norrhammar south of Jönköping, Hova in Gullspång municipality, at Skara Sommarland and in Munkedal in 2023 as well as in Bollebygd last year.
What actually happened in the class action lawsuits, often with tens of people in each "team", was practically agreed upon by everyone during the trial. Films and still images in confiscated phones and published on social media, but also hundreds of chat messages, made the evidence a simple process for the prosecutor Mats Ihlbom.
Although the six defendants basically answered "no comment" right through the police interrogation, it sounded different in the courtroom from the older men.
In a post on social media, the 35-year-old wrote "a little pre-party before the match yesterday". Wisemen were victorious after two minutes' and in pictures he was seen directing the proceedings during a 'match'.
- As a judge, you mediate and ensure that certain rules are followed. I pass on information, I mediate between the groups, but I don't instruct who is involved or who should do what, he said in the courtroom.
The line of defense has thus been that it was not about assault at all but martial arts.
- The applicable law is that of certain martial arts matches. What my client has done has taken place within the framework of sports practice. There has been consent from those who participated, said the 35-year-old's lawyer Sina Safashad.
To justify the acquittal, the lawyer has also referred to the concept of social adequacy, a type of impunity ground where one can be acquitted with reference to the fact that what happened can be seen as generally accepted. The lawyer was compared to fights inside a hockey rink.
But prosecutor Mats Ihlbom argues that these organized fights in other similar legal cases led to convictions.
- This violence is not something that you can consent to, it has crossed that line and is punishable. Here you hit and kick a lying person, said Ihlbom during the trial.
At the police headquarters in Gothenburg, the legal case has been seen as important to pursue with reference to the fact that they consider themselves to have evidence that the fights in practice function as a kind of gateway for young people to partly "qualify" to be among the Wisemen group.
It has its permanent place at the top of the so-called Kommandobryggan, as the home stand is called when IFK Göteborg plays at Gamla Ullevi.
But on that stand, the police believe that relations and insocialization to more serious and organized crime are also established, beyond crimes such as burning bengals by masked supporters.
But the 35-year-old's lawyer Sina Safashad objected in the courtroom that the Wisemen should be considered a violent group.
- It's a supporter group, it contributes to a good atmosphere at matches. Wisemen is also invited by IFK Gothenburg's management for talks and usually has a good relationship with the police, he claimed.
In Wednesday's verdict, the district court writes that the 35-year-old is sentenced to five months in prison. "The nature of the crime and his recurrence of the same type of crime lead to the penalty being determined to be imprisonment," writes the district court.
Of the other defendants, two are sentenced to probation, two people receive a suspended sentence and community service, and the 30-year-old leader is sentenced to seven months in prison for assault and serious unlawful invasion of privacy.
