[1][2] The box contains the band's studio albums (but excludes the post-breakup album Cut the Crap) newly re-mastered by Mick Jones, with a further three discs featuring demos, non-album singles, rarities and B-sides, a DVD with previously unseen footage by both Don Letts and Julien Temple, original promo videos and live footage, plus an owner's manual booklet, reprints of the band's original 'Armagideon Times' fanzine and merchandise including dog tags, badges, stickers and a poster.

In a September 2013 interview, Mick Jones announced the box sets and hits package will be the final time he works on anything involving the Clash and their music.

Bassist Simonon highlighted a guitar line on "Safe European Home", from the band's second album Give 'Em Enough Rope, saying he'd never even heard it before.

"[11] The Telegraph's Patrick Sawer wrote "The tracks, remastered by the band’s guitarist Mick Jones and Tim Young (who won a Grammy for his work on the Beatles 2006 Love album), sound fresh as ever, crisper even.

Jones, the official muso of the band, said that during the remastering process he discovered guitar lines he couldn’t remember and previously buried instrumental details certainly stand out – along with Strummer’s biting ad-libs.