Shadow XR Varsity Xenith Football Helmets, Shoulder Pads & Facemasks
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Padded helmet cover shows little protection for football players
Guardian Caps Guardian Sports
NFL training camps: Guardian Cap players are wearing over helmets, why
NFL's use of Guardian padded helmet caps in camp draws support and
Wearing headgear for sport does not protect against concussion
Reduces impact up to 33% One size fits all Insulates in hot & cold weather Fits both football and lacrosse helmets Connects to the facemask with 4
Guardian Protective Helmet Cover
The N.F.L.'s Incredible Shrinking Pads - The New York Times
San Francisco 49ers Chrome Mini Hover Helmet
Guardian Cap - Soft-Shell Protective Helmet Cover
NFL: Concussions dropped by more than 50% among players who wore
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
GameBreaker-Pro Soft Shell Helmet
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play