Swedish folk music band originally consisting of Olov Johansson, Mikael Marin and Roger Tallroth. Later Andre Ferrari also joined the group. As of 2017 they have released 18 albums, featured on others, and have toured every year also outside of Europe. Since 2002, however, performances outside Sweden have tended to not include Andre Ferrari, owing to his reluctance to tour internationally and the economic advantage of a trio. Since then, Väsen has released seven albums in this "strings-only" format.