The Safest Football Helmet Is Not Yet a Hit in the NFL - WSJ
NFL, NFLPA Release 2020 Helmet Laboratory Testing Performance Results
The NFL's Helmet Tests Are Brainless
Guardian Caps Guardian Sports
Light helmet design's effectiveness pits company versus NFL, NFLPA and their testing - The Athletic
NFL-Funded Lab Building a Safer Football Helmet
Montreal-based consortium one of three winners of NFL helmet safety challenge
Steelers debut new, safer helmets for off-season training
New Smart Helmet Could Spot Concussions in Real Time