What Pros Wear: Top 5 Helmets Rated by the NFL & NFLPA - What Pros Wear
NFL approves alternate helmets beginning in 2022
What you need to know about the NFL's new helmet rule - The Boston Globe
NFL teams are using a new, safer helmet — the Vicis Zero1
The 2023 Uni Watch NFL Season Preview - by Paul Lukas
NFL Draft 2022: Everything to know for Detroit Lions
NFL's new helmet rules will make for a lot of bad calls
NFL returns social justice helmet decals, end zone stencils
Insider Knowledge: NFL coach-to-player communication
Explaining NFL's new helmet rule: FAQs about league's 'culture change'
NFL draft guide: Packers fans, here's everything you need to know
NFL uniform rules and regulations are strict, in a good way - Sports Illustrated
Guardian Caps Guardian Sports
Vicis high-tech helmets take top 3 spots in NFL's annual performance ranking of equipment – GeekWire