[citation needed] The same year Sleeper released Party Pajamas as a part of the Holiday Collection’17 which soon[7] and appeared on the covers of British versions of Cosmopolitan[8] and Tatler.

[9] In February 2019, Sleeper's co-founders Kate Zubarieva and Asya Varetsa were included into the European Forbes’ 30 under 30 list in the Arts & Culture category.

Since Kate was 19, she worked in Playing Fashion newspaper (2009) and later held the position of editor-in-chief of the online version of the Pink magazine (2010-2013), VDOH (2010-2013).

Sleeper's customers include Eva Chen, Katy Perry, Brie Larson, Kourtney Kardashian, Aurora James, Kelly Lynch, Busy Philipps, Chloë Grace Moretz, Zoey Deutch, Dakota and Elle Fanning, Veronika Heilbrunner, and Lena Dunham amongst others.

Sleeper's collections are sold at Net-a-Porter, Saks Fifth Avenue, Harvey Nichols, Shopbop, Bloomingdale's, Nordstrom, Harrods, Browns, Neiman Marcus, Ounass.

[16] Since 2020, the brand has donated to Black Girl Ventures and NAACP LDF to support fighting for racial justice in the US and around the globe.