NFL helmet safety testing results: Vicis ranks first again for its high-tech head protector – GeekWire
NFL to prohibit use of certain helmets for 1st time
Coming to an NFL game near you, the Zero1, a helmet that helps guard against brain injuries
The Zero1 Flexible Football Helmet May Save Players' Brains
Behind the downfall of helmet darling VICIS: Market barriers, eroding cash and a '$1,000 paperweight' - The Athletic
VICIS Zero1 top testing helmet NFL
Seattle-based VICIS unveils new design for football helmets
Vicis 02 Football Helmet The Safest in Football
VICIS has top 3 helmets in survey including lineman model
The Football Helmet Just Got the Biggest Redesign Since the 1960s--and It's Coming to the NFL Next Season
Varsity Football Helmet Ratings