The Faroe Islands Premier League, is the top level of football in the Faroe Islands. It and was founded in 2005, replacing 1. deild. It is organised by the Faroe Islands Football Association. The league is now called Effodeildin, from February 2009 to December 2011 was known as Vodafonedeildin and Formuladeildin from 2005 to 2008 for sponsorship reasons. The league will be called Effodeildin until 2017. It currently has 10 participating clubs. At the end of each season, two teams are relegated and two promoted from 1. deild