Back in 2022, the NFL allowed teams to have alternate helmet designs after a decade of not allowing teams to do so.
The Cincinnati Bengals immediately took advantage, adding in the white helmets to go with their all-white uniforms.
Now, the NFL has revised the policy even more, allowing for a third helmet design. For teams going through the uniform change process this offseason, they can add a third helmet design for 2024, and for the rest of the teams, which includes the Bengals, they can add it in 2025.
The NFL informed clubs today it has revised the uniform policy to allow teams a third helmet design, per source.