What are Guardian Caps? How are they used in the NFL?
Briefly

Guardian Caps are large, soft-shelled pads worn over football helmets, designed to reduce the risk of concussions and other head injuries during play. They absorb at least 10% of the force of a hit, according to NFL research.
Erin and Lee Hanson started Guardian Sports in 2011 with a mission to protect athletes by developing optimal sports equipment, stemming from a lawsuit concerning NFL concussions and a critical film about CTE.
NFL players are required to wear Guardian Caps during training camp practices, while they can choose to wear them during games for the first time in the 2024 season, enhancing player safety.
The design of Guardian Caps has evolved significantly since their introduction, moving from a fixed strap to elastic straps that accommodate motion better, showcasing the ongoing innovation in protective gear.
Read at ESPN.com
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