Puffy Guardian Caps Could Reduce NFL Player Concussions
NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts
EXPLAINER: NFL using helmet caps for player safety, research - The San Diego Union-Tribune
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
NFL training camps: Guardian Cap players are wearing over helmets, why
Robert Saleh dislikes the new Guardian Caps: And he has a point
Steelers debut new, safer helmets for off-season training
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
NFL hopes to reduce head injuries with helmet experiment - Seattle Sports
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
Guardian Caps: Why some NFL players are wearing them in training camps
The Coat of Arms Added Protection or False Security: Football Tests New Guardian Caps to Prevent Concussions
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear