Latex mask generally refers to a full-hea enclosure or disguise, often worn by someone as a part of a costume and made from synthetic latex rubber. Latex masks are particularly popular around holidays such as Halloween. Latex masks were among the earlier arts, typically in film but applying also to the theatre, originally called 'special effects,' condensed later to 'F/X,' before the term became associated more frequently with the creation of computer-generated imagery such as the work of SGI (Silicon Graphics Corporation of Silicon Valley) in its work on 'creating' dinosaurs for the film Jurassic Park.