Guardian Caps Debut at Training Camps Across the NFL
These puffy helmet caps are the next big thing in NFL player safety, National Sports
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Bombers set to don Guardian Caps” on helmets at training camp
NFL players don Guardian Caps, designed to protect from concussion
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Morse says 'Halo' helmets making a difference
Guardian Caps: Why some NFL players are wearing them in training camps
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries