Xaverian High in Mass. introduces Guardian Caps for football players
Guardian Cap debuts during minicamps in effort to reduce avoidable head contact
What's with padded helmet caps teams are wearing
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
NFL players wear Guardian Caps to reduce head trauma during training camp
Why are NFL players wearing padding on helmets at training camp?
Chicago Bears: Why players are wearing padded helmets
CFL players adjust to their bigger heads, helmet covers worn in practice
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
What are Glacier Peak players wearing on their helmets?
NFL hopes to reduce head injuries with helmet experiment
Patriots, rest of NFL wearing cushioned helmet caps at training camp, per new mandate - CBS Boston
Leatherhead to Radio-head: The Evolution of the Football Helmet, Arts & Culture
Guardian Caps: The new helmets worn by several NFL teams
Guardian Innovations new Tech - Peachtree Corners Magazine