CFL introduces mandatory extra helmet protection for multiple
Guardian Caps - Are the soft-shelled football helmet covers
Is the extra white padding on their helmets for practice a new
UW Study Finds Football Helmet Type, Brand Doesn't Lower Risk Of
Helmets: Guide to Choosing the Best Ones for Youth Sports - Ogborn
The NFL and Concussions: The Overlooked Obvious - Bolts From
Puffy, spongy Guardian Caps could help curb NFL head injuries
NFL Looks to Helmet Technology to Combat Concussions
Week 5 and 6: Composition of Helmets - BASIS Independent McLean
More padding the issue of concussions and better helmets
NFL Sees a Drop in Concussions, But Problems Linger
New Football Helmet Could Save the Sport
Composites tackle concussions
NYIT study: Padded helmets provide scant protection from