. . "Color-shifting lenticular baseball cap"@en . "A color-shifting lenticular baseball cap was worn by Marty McFly to enable him to pose as his son Marty Jr. in 2015. The cap had an elastic headband, as opposed to the adjustable kind, and was made of shiny lenticular material that changed color depending on the angle of the light striking it."@en . . . "A color-shifting lenticular baseball cap was worn by Marty McFly to enable him to pose as his son Marty Jr. in 2015. The cap had an elastic headband, as opposed to the adjustable kind, and was made of shiny lenticular material that changed color depending on the angle of the light striking it."@en .