Guardian cap' to prevent head injuries mandated for practices, CFL says
Ohio State Aiming To Reduce Head Injuries With Guardian Caps - Sports Illustrated Ohio State Buckeyes News, Analysis and More
UGA football linemen wearing padded helmet covers designed to reduce impact
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Guardian Cap Debuts at Training Camps League-wide
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Puffy Guardian Caps Could Reduce NFL Player Concussions
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
If a player wanted to wear a Guardian Cap during a game, the league would prohibit it - NBC Sports
New Football Helmet Covers Improve Safety
Guardian Caps The Rundown
Padded helmet cover shows little protection for football players - Scope