More teams practicing with Guardian Caps, Sports
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Staples football pioneers use of 'Guardian Caps'
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL players don Guardian Caps, designed to protect from concussion
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
What are Guardian Caps? Shadow Hills football using new device to reduce head injuries
NFL players beginning to adopt protective Guardian Caps over helmets at practice - NBC Sports
Guardian Caps Guardian Sports
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear