A Spanish language reggaeton song, it blends the genre's classic roots with contemporary influences, and samples Daddy Yankee's 1996 track "Camuflash".

The track received widely positive reviews from music critics, who complimented its energy and fusion of reggaeton's classic perreo and modern electronic rhythms.

[1][4] On January 23, 2023, Alejandro revealed that the hidden track would be replaced with a collaboration with Daddy Yankee, performing a preview of it at Calle San Sebastián Festival.

[6] On January 26, 2023, "Panties y Brasieres" was released for digital download and streaming by Sony Music Latin and Duars Entertainment as the fifth single from Saturno and replaced "Track 7" on the album.

[4] During an interview with Apple Music 1's Zane Lowe, Alejandro named Daddy Yankee as an inspiration, noting that he means "reggaeton himself" for him, being "one of the first artists who put that type of genre outside the island, around the world, with his biggest hit, 'Gasolina'", that makes him "feel really, really proud".

[9] Also Daddy Yankee listed Alejandro as part of "a new generation moving reggaeton and urbano into the future" in his cover story with Rolling Stone: "It was always my goal to carry the banner and lead, and then have other people keep going.

It features a dynamic perreo rhythm that pays homage to Daddy Yankee's "old school" style, particularly through the samples from his 1996 song "Camuflash" and references to his 2005 hit "Rompe".

Daddy Yankee's verses set the stage, supported by a bass-driven beat, while Alejandro adds his "signature" and "modern" rhythms, infusing the song with a fresh twist while still honoring the traditional sounds of the genre.

[9] Uproxx reviewer Lucas Villa called it "freaky", noting that Alejandro pushed "reggaeton's classic perreo sound into the future with his electronica touch".

[15] "Panties y Brasieres" was nominated for Urban Song of the Year at the 36th Lo Nuestro Awards, but lost to "Classy 101" by Feid and Young Miko.

The video presents a forward-thinking, computerized visual experience, showcasing a setting that's reminiscent of the end of the world, populated by mechanical beings and costumes that seem extraterrestrial.