This thesis investigates how body positivity and sustainability are discursively constructed by fast fashion brands. The brand chosen as a case study is H&M, as it describes itself as being both environmentally and socially involved. Yet, despite H&M's claims, during our preliminary research we were able to detect the lack of accessibility of sustainable collections to plus size customers. In this essay, we analyze how H&M communicates body inclusivity in its sustainability reports, website, and YouTube campaigns promoting conscious lines. Drawing on theories of representation, biopolitics, and post-feminism, we sought to critically analyze the previously mentioned material through a multimodal critical analysis. The results show how H&M discursively constructs health communication in different ways depending on which clothing line the brand is promoting and to which consumers it is being advertised. Class discourses were recognized, leading to exclusive access to sustainable clothing for higher income shoppers. We believe this work is relevant to opening up the discussion about democratization and making sustainable items fully accessible to everyone.