Wikipedia - PlusLiga

The PlusLiga is the highest level of men's volleyball in Poland, a professional league competition featuring volleyball clubs located in this country. It is overseen by Polska Liga Siatkówki SA (PLS SA). It is currently a 16 teams league from October to April/May. The regular season is followed by playoffs, with the winner earning the Polish Championship (Polish: Mistrzostwo Polski). It is one of the best volleyball leagues in Europe, being highly ranked in the international competitions.