NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
Find out how modern football helmets attempt to limit brain injuries | Britannica
Foam Football Helmet | Plum Grove
What Pros Wear: Top 5 Helmets Rated by the NFL & NFLPA - What Pros Wear
Guardian Caps: Why some NFL players are wearing them in training camps
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets - CBSSports.com
Smartfoam helmets could help NFL coaches diagnose concussions
Touch Football, Sold as Safer, Now Requires a Helmet - The New York Times
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Pittsburgh Steelers Players React to New Guardian Helmets - Sports Illustrated Pittsburgh Steelers News, Analysis and More
Rocksolid Soft-Shell Flag Football Helmets
The Extra Yard: The Ins and Outs of an American Football Helmet - Stories - volumegraphics.com
How a soft-shell helmet is limiting the risk of concussions at Rutgers football camp - nj.com
Chicago Bears: Why players are wearing padded helmets
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Guardian Caps | Guardian Sports
Guardian Cap debuts during minicamps in effort to reduce avoidable head contact
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead' | Sporting News
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
SAFR Helmet Covers – SAFR Sports
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Padded helmet cover shows little protection for football players - Scope
More padding the issue of concussions and better helmets
How New Helmet Technology Will Make the NFL and NHL Safer | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
