What happened: The all-gray jersey and pants pair with a royal blue helmet marked by a red streak. The design draws on Buffalo's steel mills, grain elevators and rail yards.
Why it matters: The alternate arrives for the inaugural season at the new Highmark Stadium. NFL rules required an existing team color, making the previously unused gray palette eligible.
By the numbers: The design process took eight months and included fabric selection, helmet paint finishes and broadcast testing.
What to watch: Buffalo can wear the set at home or on the road. Its game debut remains to be scheduled.