Nike SB Dunk Low ‘Civilist’ Men’s size 12, very little wear Good preowned condition The sneaker features, what at first looks like, an entirely black upper. But when the sneaker is hit by any high temperature source, such as when you stand in the sun, it morphs into a cornucopia of color. Shades of blue, red, green and yellow appear on the heat sensitive upper material creating a very cool effect.