NFL hopes to reduce head injuries with helmet experiment
Guardian Caps Guardian Sports
Reduces impact up to 33% One size fits all Insulates in hot & cold weather Fits both football and lacrosse helmets Connects to the facemask with 4
Guardian Protective Helmet Cover
What are Guardian Caps? NFL's latest padded helmets for added safety
What are Glacier Peak players wearing on their helmets?
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
NFL training camps: Guardian Cap players are wearing over helmets, why
Guardian Cap Results: “Exceeded Our Expectations”
Colleges add Guardian football protective helmet cap - Sports Illustrated
Virginia Tech Helmet Lab tests SAFR Helmet Covers, orders 110 for the VA Tech football team – SAFR Sports
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL Expands Use Of Guardian Caps In 2023 - Steelers Depot
Here's why some Patriots players are wearing caps over their helmets during training camp
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets