This research study emphasizes the social, environmental, and economic facets of the fashion supply chain and attempts to provide a thorough analysis of sustainability challenges. It aims to comprehend the effects of many sustainability programs and practices, assess the lessons gained from industry mistakes and attempts, and pinpoint areas needing more study and development. Using a qualitative approach, the paper thoroughly reviews case studies, industry white papers, and publications in peer-reviewed journals. Insights from current sustainability trends are integrated with analyses of top brands' sustainability policies, including Nike, Unilever, and Patagonia. The process involves investigating the best methods for incorporating sustainability into fundamental company operations, evaluating social and environmental sustainability efforts, and estimating the economic effects of these activities. The necessity of combining social, environmental, and ethical standards holistically, the significance of expanding sustainability initiatives beyond first-tier suppliers, and the crucial role of supply chain openness are some of the major conclusions. Notable instances include Nike's innovations in sustainable materials, Unilever's circular economy programs, and Patagonia's fair work policies. According to the report, incorporating sustainability into the operations has long-term financial advantages, including improved customer loyalty and brand reputation. This study offers fresh perspectives on the realworld difficulties and achievements of integrating sustainability into the fashion supply chain. It analyses industry standards thoroughly and offers feasible recommendations for businesses looking to improve their sustainability initiatives. The current collection of knowledge on the sustainability of the fashion supply chain is greatly enhanced by the addition of particular case studies and the investigation of cutting-edge technology and practices.