The assignment content highlights the importance of sustainability marketing practices in the fashion industry, specifically focusing on the Matter brand, a travel clothing company based in Singapore. The study emphasizes the need for companies to adopt sustainable practices to manage their sustainability and gain a competitive advantage. To achieve this, the management uses the 4 Es framework (Experience, Everyplace, Exchange, and Evangelism) to provide quality services, promote products, and generate costing. Additionally, the company adopts eco-friendly techniques, such as using natural dyes, organic colors, and recycled materials, to reduce waste and protect the environment. The study concludes that sustainable practices are essential for the fashion industry to retain customers, gain a competitive advantage, and maintain brand values.