Poster has black ink printed on off-white paper. At the top is "The / Right To Harvest / Festical / Mapenzi / Necropolis Of Love" flanked at the left and right with "Free / Concert" and "B.Y.O.W." and followed by a list of performers and speakers. At the bottom is "Halloween Costume Contest / Sun. Oct. 27, 1985 / San / Francisco / Civic Center / Polk and McCallister St. / Produces by / American Harvest Committee / Yess On Proposition G". At the bottom left and right are circles with black text at the top and marijuana leaves at the bottom.