NFL to allow teams to use alternate-color helmets starting in '22 - Niners Nation
Women's San Francisco 49ers WEAR by Erin Andrews Scarlet/Black Colorblock Cuffed Knit Hat with Pom and Scarf Set
49ers announce new red alternate throwback jerseys for 2021 to honor their 75th season in NFL
Men's New Era Black San Francisco 49ers Alternate Logo Team 49FIFTY Fitted Hat
San Francisco 49ers Get New All-Black Alternate Uniforms - WearTesters
Last time Black Alternates were worn? : r/49ers
Predicting which games Eagles will wear the alternate Kelly Green uniforms
49ers Introduce New Throwback Alternate
49ers to wear new “color rush” alternate uniforms in 2016?
49ers all-black alternate uniforms could be NFL's worst in 2015
Tracking all the new NFL uniforms and helmets for the 2022 season - ESPN