Padded helmet cover shows little protection for football players - Scope
The NFL's Helmet Tests Are Brainless
Virginia Tech research provides much-needed data, system for rating sports equipment - ESPN
Guardian Caps Guardian Sports
Exclusive Look at Football Helmet Safety Testing - ABC News
NFL Helmet Challenge seeking redesign proposals
VICIS Zero1 top testing helmet NFL
The Football Helmet Just Got the Biggest Redesign Since the 1960s--and It's Coming to the NFL Next Season
New Smart Helmet Could Spot Concussions in Real Time
Football Helmet Testing, Technology and Safety Research
NFL and NFLPA Release 2019 Helmet Laboratory Testing Performance Results
New Stanford-Developed High-Tech Helmets Could Protect Football Players From Debilitating Concussions
Leatherhead to Radio-head: The Evolution of the Football Helmet, Arts & Culture