What type of head or face protector is legal for defensive players to wear according to the rules?

A non-glare head or face protector is legal for defensive players to wear according to the rules because it is designed to meet safety standards while minimizing distractions for both the player and their opponents. Such headgear is intended to provide a level of protection to the face and head area without impairing visibility. Non-glare features are essential in a competitive sports environment to enhance focus and performance, ensuring that protective gear does not interfere with a player's ability to see and react during gameplay.

The other options, like reflective headgear, which may impair visibility due to glare, or cushioned helmets, which are typically associated with different sports and may not be compliant with the specific rules governing defensive players in this context, do not fit the criteria established for legal equipment. Additionally, while a ball cap may provide some sun protection, it does not serve the necessary protective function required in the sport, making it insufficient for defensive players in a competitive setting.