Puffy Guardian Caps Could Reduce NFL Player Concussions
Chicago Bears: Why players are wearing padded helmets
Steelers debut new, safer helmets for off-season training
EXPLAINER: NFL using helmet caps for player safety, research
NFL's use of Guardian padded helmet caps in camp draws support and
Bellmore-Merrick athletics debuts new guardian caps
Eagles Notes: New Guardian Caps get mixed reviews – Delco Times
Giants react to NFL's new 'Guardian Caps' at training camps - Big
Guardian Caps debut at NFL training camps around the league
Puffy, spongy Guardian Caps could help curb NFL head injuries