In this article, the characteristics that make a work of art feminist in the posthumanist period will be analysed through artworks in which artists show a specific ort his both the materials of their medium and non-human living and non-living things. In addition, a discussion will be carried out about the fact that when the medium and the material become the work itself in a way that reveals different content and expression potentials, it can be characterised as feminist. This discussion will be addressed through the complex relationship between instrumental reason, which can be defined as the determination of the most effective and efficient means to sustain one’s life and for the benefit of one's material interests, and the concept of patriarchy, which expresses the domination of men over women in the axis of education, employment, domestic labour, wages and care. For this reason, firstly, the positions in feminist art debates, then the conditions of attribution of care to women and the struggles initiated against this, and finally the place of artworks that are shaped within the framework of feminism, care and notions of imagination and that are interested in revealing the autonomy of the material in posthumanism discussions will be explained.