Report: Patriots agree to five-year extension with Shaq Mason
Vicis board places high-tech football helmet maker into receivership in bid to find buyer – GeekWire
EXPLAINER: NFL using helmet caps for player safety, research
Players Just Wore This Startup's New Soft Helmets in an NFL Preseason Game
Steelers Debut New Guardian Caps For Practice As Part Of New NFL Mandate - Steelers Depot
Updates from Shanahan on Sherman playing time, injuries, more
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NFL training camps: Guardian Cap players are wearing over helmets, why
Football helmets are creating more problems than they solve
What's With Those Padded Caps NFL Players Are Wearing In Training Camp?