Protective equipment in gridiron football - Wikipedia
Montrose football players wearing new plastic shields to try and prevent spread of COVID-19
An Inside Look at the Riddell Axiom Helmet - Boardroom
NFL studying helmet face guard that works like surgical mask
The Extra Yard: The Ins and Outs of an American Football Helmet - Stories
Riddell Speed Icon Football Helmet
Schutt Splash Football Shield Set
Face protection in football has come a long way – Orange County Register
Uniform Police Focus on Face Masks - The New York Times
I Like when Players Dont Use Normal Facemasks : r/nfl
NFL testing new protective face masks with surgical or N95 material - ESPN
Uni Watch: Baseball face masks a crossroads of protection, fashion - ESPN