Winnipeg Jets: A look at Connor Hellebuyck's newest goalie mask
NFL hopes to reduce head injuries with helmet experiment
NFL hopes to reduce head injuries with helmet experiment
MILITARY MATTERS: Engineers Building Smart Helmets for Soldiers to Help Prevent Head Injuries
MILITARY MATTERS: Engineers Building Smart Helmets for Soldiers to Help Prevent Head Injuries
NFL helmet maker helping curb soldiers' head injuries, Sports
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL hopes to reduce head injuries with helmet experiment