What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
Will This Device Protect Athletes' Brains, or Only Make Them Think It Does? - The New York Times
College football safety gets shaped by research, including possible head-hit counts
Guardian Caps (@guardian_caps) • Instagram photos and videos
Football Guardian Cap draws mixed reviews from players, experts for safety effectiveness - The Daily Tar Heel
NFL Guardian Caps are blasted 'STUPID' by Seattle Seahawks defensive linesman
If a player wanted to wear a Guardian Cap during a game, the league would prohibit it - NBC Sports
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
Guardian Caps: What Are They & How Do They Work?
Puffy Guardian Caps Could Reduce NFL Player Concussions
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Park High School football blazes safety trail with Guardian Caps
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NFL players don Guardian Caps, designed to protect from concussion