NFL safety: How VICIS' position-specific helmets have become all the rage - The Athletic
Football turns to helmet technology to tackle head injuries
Doug Baldwin: No reason for NFL players not to wear safer helmets
Almost all players in NFL now using top-performing helmets
NFL helmet manufacturers hope to reduce concussions, save game - Washington Times
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
The Safest Football Helmet Is Not Yet a Hit in the NFL - WSJ
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
The Football Helmet Just Got the Biggest Redesign Since the 1960s--and It's Coming to the NFL Next Season