The package is a 3-disc, 50-track rarities compilation of original B-sides, unreleased tracks, instrumentals, covers and demos curated by guitarist Kim Thayil.

Disc 1, dubbed "Originals", is filled with Soundgarden songs - mainly B-sides - in addition to two unreleased tunes, "Kristi" and "Storm." Disc 2, "Covers", presents covers of tracks by The Beatles, The Rolling Stones, The Doors, The Ramones, Devo and others. Disc 3, "Oddities", offers instrumentals, remixes and demos, including Steve Fisk's unreleased "The Telephantasm (Resurrection Remix)", "Twin Tower", and "Night Surf", an instrumental performed by bassist Ben Shepherd.