Guardian Cap Use a Concern for Watt, Saleh Early in Training Camp - Sports Illustrated
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Coverage of the NFL in Guardian Caps
Get A Load Of These Big Dumb Helmet Helmets
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Here's why some Patriots players are wearing caps over their helmets during training camp
Eagles Notes: New Guardian Caps get mixed reviews – Delco Times
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Guardian Caps: Why some NFL players are wearing them in training camps