IRWIN is a collective of Slovenian artists, primarily painters, part of Neue Slowenische Kunst (NSK). They describe their own work as "retro-principle" or "retro-avant-garde". The group is emphatic about their work being collective rather than individual. The IRWIN artists never sign their work individually: instead, they are "signed" with a stamp or certificate indicating approval as a work from the IRWIN collective. In 2004, they have received the Jakopič Award, the highest annual award in Slovene fine arts.
Although primarily painters, they have engaged in many collaborative works with other NSK art collectives, ranging from theater to music video. In 1992, in cooperation with Michael Benson, they created the performance Black Square on Red Square, in which a square of black cloth, 22 meters to a side, was unfurled on Moscow's Red Square, in homage to Kazimir Malevich and suprematism.