The newly appointed Senior Vice President of Trendy needs to put its supply chain on a more sustainable footing for the future. Trendy is an imaginary fast fashion company with a market base in Europe and a global supply chain. Core themes and actions that improve both sustainability targets and/or operational performance are discussed in the case. For sustainability, these include waste reduction, sustainability accounting, and partnerships with suppliers and eco-labels. For operational improvements, these include changing the manufacturing footprint, digitalizing the supply chain, and reducing the product portfolio. The case examines improving sustainability on Scopes 1, 2, and 3. While the case setting is in the fast fashion industry, lessons provided by this case are applicable to many industries seeking to improve their operational sustainability. The case challenges students to bring together different elements of the supply chain course to meet the objective of having more sustainable practices and achieving better operational performance.