What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
KTTC In-Depth: Guardian Caps in high school football
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Could Guardian Caps be used during NFL games for player safety?, Pro Football Talk
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL offseason priorities for 2023: Possible rules changes, safety reforms - ESPN
EXPLAINER: NFL using helmet caps for player safety, research
A closer look at the rule changes the NFL is debating - The Washington Post
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Kiski Area football adds Guardian Caps for extra level of safety during practice
Coverage of the NFL in Guardian Caps