FANS at the World Cup do everything in their power to stand out from the crowd.
While some decide to wear fancy dress, Croatia supporters have stepped it up a level with their water polo hats.
And they will bring their hats out once again when they Morocco in their third-place play-off tonight.
Croatia fans have swarmed to Russia with their water polo hatsAP:Associated Press
Why do Croatia fans wear water polo hats?
The hat is a tribute to defender Vedran Corluka.
He made history when he became the first player to wear a water polo hat during a match.
Corluka suffered a serious head injury during a match against Turkey at Euro 2016.
It kept opening up during a match against Czech Republic and he played the second half with the hat on.
Vedran Corluka played until the final whistle against Czech RepublicGetty – Contributor
The defender even managed to score and the game finished 2-2.
UEFA checked it over and made him remove the ear protectors before he was allowed to carry on.
In fact, the hat that he wore is now held in UEFA’s museum.
Croatia’s physio Nderim Redzaj is credited with coming up with the idea.
Fans have been wearing the head gear since 2016Reuters