NFL to lift single-helmet rule in 2022; could NY Jets throwbacks return?
Patriots bringing back throwback uniforms
Check out more awesome unofficial alternate NFL helmets - ESPN
NFL to allow teams to wear alternate-color helmets starting in the 2022 season
NFL to allow alternate-colored helmets starting in 2022 - Mile High Report
Alternate helmets approved to return to NFL starting in 2022. Which throwback style do you want to see the Broncos wear again? : r/DenverBroncos
The NFL is allowing teams to bring back the use of alternate helmets starting in 2022 - Article - Bardown
Rams uniform changes: Will LA add alternate throwbacks again? - Turf Show Times
NFL approves alternate helmets starting in 2022
5 NFL throwback uniforms we have to see in 2022
Arizona Cardinals unveil alternate helmets for 2022 season
The 2023 Uni Watch NFL Season Preview - by Paul Lukas