He has featured in advertisements for various brands, including Dior Homme, Balmain, Hugo Boss, Etro, L'Oréal, Armani Exchange, H&M, and Tommy Hilfiger.

[11][12] He has since walked for many fashion brands including Jean Paul Gaultier, Dior Homme, Versace, Dolce & Gabbana, DSquared², Gucci, Roberto Cavalli, Thierry Mugler, Armani, and Balmain.

He has appeared in campaigns for DKNY, Lacoste, Armani Exchange, Etro, Dior, DSquared², Mavi Jeans, Balmain, and Tommy Hilfiger.

have expressed concern over the dangers of some "lookmaxxers" eating as little as possibly in order to try and emulate Lachowski's more defined and angular "modelesque" facial appearance.

He has criticized the extreme parts of the movement, saying it is "disheartening and concerning" and "saddening" to find out he was associated with such practices, and that he encourages all his fans to prioritize a healthy lifestyle with balance and self-care.