sentences:  The appearance and style of the masks do not usually differ significantly between albums; members typically maintain the established theme of their mask while adding new elements.Jordison, in an interview in 2004, said the masks are updated to show growth within each individual.Slipknot's members have worn special masks for specific occasions, most notably for the music video and live performances of "Vermilion" in 2004 and 2005 when they wore life masks made from casts of their own faces.