NFL, NFLPA approve helmet designed to reduce QB concussions - ESPN
First QB Helmet Designed To Help Reduce Concussions Approved
VICIS Zero1 top testing helmet NFL
NFL to prohibit use of certain helmets for the first time, NFL
NFL, players' union approve QB-specific helmet designed to reduce concussions – NBC Sports Boston
First QB helmet designed to help reduce concussions approved
QB helmet designed to reduce concussions approved by NFL - The Iola Register
First QB helmet designed to help reduce concussions approved
NFL, NFLPA release results of annual helmet testing: Three previously approved models now prohibited
Everything you need to know about the NFL's helmet guidelines and restrictions - Canal Street Chronicles
NFL hopes to reduce head injuries with helmet experiment
Tua help on the way? NFL approves first QB helmet designed to help reduce concussions – Sun Sentinel