Featuring a slew of upcoming popular MCs over a beat crafted by Hit-Boy—the producer behind “Niggas in Paris”—"1Train" was the most anticipated track for many prior to the release of LONG.LIVE.A$AP. Hit-Boy also produced Rocky’s first single from the album, “Goldie,” and the featured artist Kendrick Lamar can be heard on another of the album’s songs.

In an interview with Peter Rosenberg and Hot 97, Rocky explains why he chose these features, who had his favorite verse, and the significance of the track’s title.

The song hit the internet on the 18th of December 2012, the same day the entire album leaked and nearly a month prior to the actual release date.