"Know Your Product" is a song written by Ed Kuepper and Chris Bailey of Australian rock band The Saints. Released in February 1978, it was the second single from the group's second album, Eternally Yours. Noted for its unusual mix of prominent brass with a punk rock guitar sound, the track has been described as a "pile-driving surge of raw soul power and one of the greatest singles from the punk rock period."

A transitional record for The Saints, "Know Your Product" developed the aggressive punk sound of their debut single, "(I'm) Stranded" (1976), while anticipating the horn-driven R&B of their next album, Prehistoric Sounds (1978). Regarding its musical influences, singer Chris Bailey later said, "Thank Sam and Dave for the brass section! And Stax's horns." Lyrically the song was a cynical take on consumerism; in a 2004 interview, guitarist Ed Kuepper agreed that it was "like a distant cousin to '(I Can't Get No) Satisfaction'."

A video of the band performing "Know Your Product" was released, shot entirely in solarised colour. The single did not chart, however. Referring to one of the leading mainstream DJs on BBC Radio 1, Bailey noted "Tony Blackburn didn't like it, which was the biggest compliment you could have at the time." The B-side, "Run Down", also appeared on Eternally Yours; in place of the A-side's horns it employed harmonica to augment the band's regular guitar, bass and drum sound. Another track on the album was punningly titled "No, Your Product".

The Guardian said that having this as the opening track on Eternally Yours "confused pretty much everyone: what the hell was a brass section doing on a punk record? The punchy horns are the perfect counterpart to Bailey’s drawled vocals and Kuepper’s buzzsaw guitar." While noting that the song was doomed to make little impact in the charts, it was described as "one of the greatest Australian singles ever made."

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