Black NFL Players Still Wear Their Hair in Locs Despite the Challenges - The New York Times
Schutt F7 VTD Adult Football Helmet - Sports Unlimited
The N.F.L.'s Incredible Shrinking Pads - The New York Times
Ban on helmet covers sparks controversy
NFL training camps: Guardian Cap players are wearing over helmets, why
Guardian Cap - Soft-Shell Protective Helmet Cover : Football Helmets : Sports & Outdoors
Guardian Cap - Soft-Shell Protective Helmet Cover : Football Helmets : Sports & Outdoors
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL: Concussions dropped by more than 50% among players who wore Guardian Caps during summer