NFL's use of Guardian padded helmet caps in camp draws support and
Guardian Caps: Why some NFL players are wearing them in training camps
Unpopular guardian caps could provide false sense of security
Guardian cap' to prevent head injuries mandated for practices, CFL
NFL report: concussions dropped 50 PERCENT when players wore new
EXPLAINER: NFL using helmet caps for player safety, research
NFL hopes to reduce head injuries with helmet experiment
NFL report: concussions dropped 50 PERCENT when players wore new
What are those funny-looking soft caps on NFL helmets during camp
EXPLAINER: NFL using helmet caps for player safety, research
Puffy, spongy Guardian Caps could help curb NFL head injuries
Bombers set to don Guardian Caps” on helmets at training camp