What are Guardian Caps? NFL's latest padded helmets for added safety
Steelers debut new, safer helmets for off-season training
Have you seen the strange helmets Cowboys players are wearing in camp? Here's the story
Guardian Caps Guardian Sports
NFL Executive VP: League Saw 52 Percent Decrease In Concussions At Positions Wearing Guardian Caps - Steelers Depot
EXPLAINER: NFL using helmet caps for player safety, research
Padded helmet cover shows little protection for football players - Scope
Browns wearing Guardian Caps during training camp
Guardian Caps Guardian Sports
Puffy Guardian Caps Could Reduce NFL Player Concussions
NFL players don Guardian Caps, designed to protect from concussion