"Sweet Lucy" is a cover of Michael Hurley's 1976 original, and "Wild Mountain Thyme" was originally an Irish/Scottish folk song.
The two covers were recorded by McCombs and Gunn earlier this year, and are released to fill the void of their co-headlining tour that got cancelled due to COVID-19.
According to Stereogum, McCombs says of the tracks, "We did them both the same day, as quickly as possible, in a studio in Burbank. It was supposed to be a souvenir. I suppose it still is, but for a different reason. We decided to release a 7" of them on Juneteenth and donate proceeds to these organisations supporting black lives to stand in solidarity with the Black Lives Matter Movement."