With concussions at forefront of minds, helmet designs more important
The N.F.L.'s Favorite Helmet Maker Is in Financial Trouble - The New York Times
NFL, NFLPA approve new helmets for quarterbacks in latest step to combat concussions
NFL helmet safety testing results: Vicis ranks first again for its high-tech head protector – GeekWire
New 'QB-Specific' Helmets Unveiled, Will Kenny Pickett Wear One? - Steelers Depot
Football's First Position-Specific Helmet Introducing the VICIS ZERO2 TRENCH
The Safest Football Helmet Is Not Yet a Hit in the NFL - WSJ
NFL to test new position-specific helmet designed for linemen - ESPN
Helmet Laboratory Testing Performance Results
NFL at 100: Helmets go high tech in quest for player safety