It is the responsibility of the referee to determine that all players are in compliance with FIFA Laws of the Game Law 4, which states in part that “A player must not use equipment or wear anything which is dangerous to himself or another player (including any kind of jewelry).” A referee may look at shoes that have been manufactured for another sport and decide that the shoes would be safe on the soccer field, but it is also possible that a specific shoe, in the opinion of the referee, would be dangerous on the field. The style of baseball shoe that included a flat metal cleat by the toe would undoubtedly fall into this unsafe category. Even some shoes manufactured for soccer could be dangerous. For instance, cleats with screw-in studs may be worn down so that there is metal showing. In such an instance, the referee may consider these to be unsafe.