Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
Guardian Caps - Are the soft-shelled football helmet covers
The Fruitless Search for a 'Concussion-Proof' Football Helmet
The Longevity Project: Traumatic brain injury and concussion
Week 5 and 6: Composition of Helmets - BASIS Independent McLean
Helmets act like a car bumper to protect your brain
Football Helmets and Concussion: Equaling the Playing Field
Study Shows Concussion Risk 'Dependent on Helmet'
Football helmet with liquid padding may prevent concussions
CFL introduces mandatory extra helmet protection for multiple
Safety first: Lopers to wear padded caps in practice to prevent
Guardian Caps Guardian Sports