What is a Guardian Cap? Meet the NFL's newest safety measure
For Giants and the NFL, it's the Summer of Guardian Caps - Newsday
Coverage of the NFL in Guardian Caps
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Guardian Caps Guardian Sports
NFL 2023 Season Guardian Caps Mandate Supported By 52% Concussion Drop – Sports Techie
NFL hopes to reduce head injuries with helmet experiment
NFL players wear Guardian Caps to reduce head trauma during training camp
NFL hopes to reduce head injuries with helmet experiment
Guardian Caps Exceed NFL's Expectations - Guardian Sports
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
EXPLAINER: NFL using helmet caps for player safety, research - The San Diego Union-Tribune