The b-side to Sigur Rós' Record Store Day 10" has surfaced, and you can hear it below. The track is called 'Kvistur', and it doesn't feature on their forthcoming album valtari, so if you managed to grab yourself a copy on Saturday, well done!

Listen to 'Kvistur' below, as well as the a-side 'Ekki múkk' (which does appear on the album).