Guardian cap' to prevent head injuries mandated for practices, CFL says
Guardian Caps Guardian Sports
The Coat of Arms Discussion: How are Serious Concussion Issues Changing Football?
Bombers set to don Guardian Caps” on helmets at training camp
The Coat of Arms Added Protection or False Security: Football Tests New Guardian Caps to Prevent Concussions
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
Guardian Caps a fit for Park Wolfpack - Cottage Grove Journal
Padded helmet cover shows little protection for football players - Scope
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Concussion Solution? – The Neersyde
John's Journal: Park Football Team Is All In On Concussion Safety, News
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
NFL hopes to reduce head injuries with helmet experiment, Sports