although all tracks had already been released, björk "felt it important to gather together the essence of the remixes" so she "picked a quarter of them for one cd for people who are perhaps not too sassy [sic] downloaders or don't have the time or energy to partake in the hunter-gathering rituals of the internet". the cover features the 'strata' persona björk adopted for the "mutual core" music video which was directed by andrew thomas huang.