S-Group is Finland's second largest supermarket chain, after the market leader K-Kauppa. In Finland, it is a co-operative organisation called S-ryhmä, and in Swedish is S-Gruppen. It's full formal name is Suomen Osuuskauppojen Keskuskunta SOK. It retails several types of supermarket, the no-frills supermarket Alepa in Helsinki Metropolitan Area, the country store Sale, the supermarket S-Market to the giant hypermarket Prisma. It retails the general own label Rainbow, the no-frills Hyvä Ostos (Good buy) and international Coop label. Its loyalty card is called S-Etukortti.