Polish rapper and music producer. Marten is a founding member of Polish hip-hop group Kaliber 44 and, since 2002, a solo artist. He is a member of Polish Society of the Phonographic Industry. Marten is a winner of two Fryderyk awards. In 2011, Machina magazine placed Marten at No.17 on the list of 30 best Polish rappers. He has also collaborated with artists like Piotr Banach, Bosski Roman, Maciej Malenczuk, Wojciech Waglewski, Grubson, L.U.C and O.S.T.R.