Decolonial scholars call for fashion definitions and perspectives from all cultures, and this article responds to these requests. Numerous theories and positions have inspired and shaped this conceptual model, including valuable insight from First Nations scholars who have explored fashion theories that integrate First Nations philosophies and ontologies. This First Nations fashion, art and style conceptual model explores the practice and outlines the themes of Culture, Expression, and Self-determination. First Nations fashion, art and style, as a term, acknowledges the holistic practice and industry, which includes fashion design, style, and the intersection of art via textiles and garments. The Cultural element within the model explores the continuation of cultural practice through design and dress and how it can contribute to cultural well-being. The Expression element describes contemporary cultural and intersectional identity forms through traditional and modern garments. The Self-determination component explores the autonomy of First Nations fashion practices and how First Nations people self-determine their fashion brands via cultural, financial, and environmental sustainability. This article concludes with recommendations for further theoretical and empirical research on First Nations fashion, art and style.