He founded "Bare Møbler Designstudio" in the same city in 2003. Their "Eiko" won the "Chair of the year" award from Elle Interiør in 2004, and Bare Møbler were named "Best young designers" in 2006 by Norsk Form. Karl Marius draws inspiration from the Scandinavian way of thinking and living. This can be seen in his products, which are easy and simple furniture, with both aesthetic and functional values.

Karl Marius is partner in Mokasser AS.