Guardian Cap - Soft-Shell Helmet Cover for Football and Lacrosse, Navy
NFL rejects polyurethane safety caps for football helmets
Football Guardian Caps XT
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Bellmore-Merrick athletics debuts new guardian caps, Herald Community Newspapers
NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
Guardian Cap Debuts at Training Camps League-wide
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
Why the Ticats are wearing those giant helmets at practice
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
What are Guardian caps? See the NFL's latest head protection device - Deseret News
NFL mandates use of Guardian Caps for training camp in 2022 - Cincy Jungle
Guardian Cap: What are and why the NFL asks this safety measure in helmets