Guardian Cap Use a Concern for Watt, Saleh Early in Training Camp - Sports Illustrated
Australian Philadelphia Eagles NFL star Jordan Mailata calls bizarre-looking safety gear 'fake news'
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Why are NFL players wearing padding on helmets at training camp?
What are Guardian Caps? NFL's latest padded helmets for added safety
Philadelphia Eagles: Jason Kelce has hilarious response to new safety measures
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
Why are NFL players wearing padding on helmets at training camp?
Why Alabama football players are wearing padded helmets in practice
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Why are NFL players wearing padding on helmets at training camp?
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL: Concussions dropped by more than 50% among players who wore Guardian Caps during summer