As 6ix9ine, Daniel Hernandez broke through in 2017 with "Gummo," a hyper-combative single that reached number 12 on the Billboard Hot 100. The hit was quickly followed by the similar "Kooda" and the comparatively relaxed (if still high-energy) "Keke," the latter of which featured Fetty Wap and A Boogie wit da Hoodie, who tempered Hernandez's blaring rhymes with a little melodicism.
Day69, Hernandez's first commercial mixtape, includes all three of those tracks among a fresh batch of shrieking nihilistic declarations accompanied by blunt trap beats and ominous synthesized strings. Tory Lanez and Young Thug appear on "Rondo," while Offset provided some contrast on a remix of "Gummo."