What type of surface is allowed for head or face protectors worn by defensive players?

Head or face protectors worn by defensive players must be made of non-glare surfaces to ensure visibility and reduce distractions during play. This is crucial because glare can hinder a player's ability to see the ball, their teammates, and the opponents, potentially impacting the safety and flow of the game. Non-glare surfaces help maintain focus and support effective gameplay by not reflecting light or creating annoying visual disturbances.

While other surfaces might be visually appealing or innovative, they could compromise performance and safety. Therefore, restrictively using non-glare materials is a well-considered guideline in the sport to promote better visibility and effectiveness on the field.