NFL mandates use of Guardian Caps for training camp in 2022 - Cincy Jungle
Guardian Caps debut at training camps throughout NFL
Coverage of the NFL in Guardian Caps
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
NFL hopes to reduce head injuries with 'goofy' helmet experiment
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Jonathan Allen clearly isn't a fan of NFL's mandated safety helmets
NFL hopes to reduce head injuries with helmet experiment
Bombers set to don Guardian Caps” on helmets at training camp