The story behind those soft-shell puffy Guardian Caps players have
NFL report: concussions dropped 50 PERCENT when players wore new
What are Guardian Caps? Shadow Hills football using new device to
High school football teams go soft in the fight against brain injuries
Smith] NFL says positions wearing Guardian Caps saw 52% decrease
Chicago Bears: Why players are wearing padded helmets
Guardian Cap debuts during minicamps in effort to reduce avoidable
High school football teams go soft in the fight against brain injuries
Why Chiefs players are wearing special foam caps over helmets
Guardian Caps leave some NFL players and coaches with concerns
Guardian Caps - Are the soft-shelled football helmet covers