Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
NFL could move to requiring Guardian Caps in games
Coverage of the NFL in Guardian Caps
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Puffy Guardian Caps Could Reduce NFL Player Concussions
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
What are Guardian Caps? Shadow Hills football using new device to reduce head injuries
Guardian Caps: NFL Requires Use Of Helmet Cover At Training, 46% OFF
High school football teams go soft in the fight against brain injuries
NFL players wear Guardian Caps to reduce head trauma during training camp