How Notre Dame hopes to help a helmet revolution
NFL to prohibit use of certain helmets for 1st time – The Denver Post
Vicis high-tech helmets take top 3 spots in NFL's annual performance ranking of equipment – GeekWire
The First Plastic Football Helmet Often Broke on Impact - The Atlantic
Examining a Safer Option for Football Helmets
This Flexible Football Helmet Absorbs Hits Like a Car Bumper
NFL helmet maker helping curb soldiers' head injuries, Sports
NFL helmet maker helping curb soldiers' head injuries
Why Marine City Cardinal Mooney football spent $35,000 on new helmets
Joe Burrow's new helmet is newly designed to help address old weak spots
Riddell launches Axiom, latest helmet to combat concussions