In this image, please note the different colored stripes printed above the County of Fairfax, Office of Elections address on the front of the outer mailer. These are circled in red.
The color of this stripe indicates the Congressional District (CD) in which the voter resides. For November 2020, there will also be a different color stripe for the Town of Herndon (orange). The outer mailer for Herndon is not shown on this slide.
These different colored stripes serve as a valuable sorting tool to ensure that ballots from the same CDs are kept together during the processing operations.