In 2021, the NFL approved rule changes allowing alternate helmets with throwback uniforms.
The use of a second helmet was dropped in 2013 over concerns that wearing more than one helmet might not be safe for players. As those concerns have eased, clubs have lobbied for a second helmet because options for alternate jerseys were expanded in 2018. The new uniforms can be used starting in the 2022 season.
According to a league memo, the second helmet can be worn only with so-called classic, alternate or Color Rush jerseys.
That means some of the best classic NFL uniforms could be back this season.