Ellyes Skhiri of Tunisia

Some footballers have taken to the field during the World Cup matches with some strange masks that resemble that of the musical Phantom of the Opera.

Masks are easily confused with any fashion style, but in fact it is not. They are high-tech protective equipment.

Josko Guardiol of Croatia

The masks are made from materials such as polycarbonate and protect athletes who have suffered facial injuries, ensuring they can play without risking further injury.

Josko Guardiol

Some are 3D printed to fit their face exactly.

Son Heung-min of South Korea