Bluebird Yarn is located just north of the Golden Gate Bridge in the city of Sausalito. We did knit it originally in Shibui Worsted, one in the colors of a foggy San Francisco Day and one with black for a San Francisco Night. This yarn has since been discontinued. In February 2016, we added additional chart options and sizing to the pattern. Almost all of our samples are knit out of Madelinetosh Vintage or Malabrigo Rios but use your favorite worsted or aran yarn. Works great for sports fans too.