NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts
EXPLAINER: NFL using helmet caps for player safety, research
Philadelphia Eagles: Jason Kelce has hilarious response to new safety measures
Guardian Cap debuts during minicamps in effort to reduce avoidable head contact
Large Bubble Helmets Are Guardian Caps, NFL's New Safety, 56% OFF
Ask the Old Guy Mailbag: Who makes the 53-man roster and who is on the bubble
Damar Hamlin and Sam Peltzman: Where Football Meets Economics - Econlib
So what exactly is that black padding on the Syracuse football helmets seen during practice?
Guardian Cap: What Are And Why The NFL Asks This Safety, 45% OFF
Why Alabama football players are wearing padded helmets in practice
Helmets – The Concussion Blog
September 2013 – The Concussion Blog