"Unravel" is the third song on the album Homogenic by Björk, which was released in 1997. The song features a prominent example of Björk's use of a half-singing, half-speaking technique which, according to folklore specialist Njall Sigurason, is comparable to that of Old Icelandic choirmen. Structurally, the song is made up of a slowly sweeping melody, saxophones, a church organ, and distant-sounding electronic beats.
Even though "Unravel" was not released as a single, a video was made by LynnFox to promote Björk's Greatest Hits Tour. The video won a silver prize at the 2004 D&AD Awards, an event recognizing annual achievements in design and advertising.
In a 2006 interview with Spin magazine, Radiohead singer Thom Yorke named "Unravel" as his favourite song ever, and said, "I'm trying to get Radiohead to do a cover because I think it's one of the most beautiful songs I've ever heard." On November 8, 2007, Yorke performed a cover of the song as part of Radiohead's "Thumbs Down" webcast.