Solju is the mother/daughter duo of Ulla Pirttijärvi – vocals, yoik, and Hildá Länsman – vocals, yoik along with members Samuli Laiho – programming, synths, guitar, piano, glockenspiel, and Teho Majamäki – percussion, vibes, hang drum. Also appearing on the release are guest artists Czech National Symphony Orchestra – strings, Paavo Lötjönen – cello, Mikko Neuvonen – throat singing, and Janne Puurtinen – synth bass, synthesizer. Ulla and Hilda are from Utsjoki, Lapland (a nothern part of Finland). They are Sami musicians who are keeping their ancient native culture alive. The unique vocalizations are called yoik. There is also more common use of singing included among the songs.