Why are NFL players wearing padding on helmets at training camp?
High school football teams go soft in the fight against brain injuries
Guardian Caps added to help reduce football concussions - The Witmarsum
Steelers debut new, safer helmets for off-season training
CWU football players wear extra helmet layer to prevent concussions
In fall camp, Montana State using Guardian Caps for safety, preservation of game
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
Could Guardian Caps be used in games? - NBC Sports
What are Guardian Caps? Shadow Hills football using new device to reduce head injuries
NFL players experimenting with 'Guardian Caps' to prevent head injuries
Guardian Caps (@guardian_caps) • Instagram photos and videos
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets