It was written by the two singers, Nate Campany, Kyle Sherear, Rafael Pina, Mau y Ricky, Jon Leone, Camilo Echeverry and its producers Daddy Yankee and Gaby Music.

"Sin Pijama" written by Becky G, Natti Natasha, Nate Campany, Kyle Sherear, Rafael Pina, Daddy Yankee, Gaby Music, Mau y Ricky, Jon Leone and Camilo Echeverry.

"[6] Gomez confessed that the song originally intended to feature Karol G, Leslie Grace and Lali, adding: "There's more women in the Latin music space right now, and I'm proud to call them my friends.

[5] She regards "Sin Pijama" as empowering for women owning their sexuality, a theme she believes is uncommon and should be accepted, specifically in Latin music.

[4] According to Telemundo, the lyrics caused controversy for its explicit themes to which Becky G responded to in an interview for Suelta la Sopa, saying: "I am a woman; I am 21 years old and I am not the father of your children.

Suzette Fernandez of Billboard magazine said it proves "women are taking control in Latin music" and "can also dominate the urban genre.

[1] In Hoy, Sergio Burstein regarded its "duo between two famous ladies at the rhythm of reggaeton" as a first for Latin music and wrote, instead of pushing feminism in culture, it uses sex in advertising to show that "girls just wanna have fun.

"[16] Similarly, Bárbara Figueroa González of Ronda magazine believed "Sin Pijama" marked "a great step for women in the urban genre.

[19] EFE's David Villafranca wrote, "With a rhythm and a sexy air that directly resemble her with 'Mayores', 'Sin Pijama' allowed Becky G to expand her list of collaborations".

[9] Gomez came up with the video concept nearly a year prior to sending it to Duran in a mobile note in January 2018 and revealed that "it took a lot of fight" for it to happen.

[35] Although she had a different idea for the video's ending, Gomez said it was her favorite part because it represented reality and did not want sexuality to be the only thing she is associated with.

[35] The song and dream sequence then start with Gomez and Natasha entering a lavish mansion party in contrasting white and black dresses.

[37] In a plot twist, they are shown having a sleepover in pajamas with face masks on, eating popcorn before Gomez receives a FaceTime from Royce to her delight.

"[38] Similarly, El Heraldo described the visual as "lace, lingerie and lots of skin", noting that the singers "show their most daring side.

"[35] Conversely, Alberto Murcia of Los 40 believed the dream concept should have been excluded, questioning if "the only way a woman has to live her sexuality is within a man's fantasy?