The purpose of the study is to analyze the role of tech-pack for the development of a sustainable supply chain management. The purpose is addressed by analyzing if tech-pack contains standard sustainable requirements and acts as an enabling factor to integrate sustainability in current textile and fashion supply chain. The nature of the research is qualitative and case study has been conducted to collect data through telephonic interviews. A Textile apparel buying agency from Pakistan was selected as a case study and data has been collected from company employees and managers from knitwear apparel manufacturers (suppliers) to ensure the relevance and validity of the research. The results and the data analysis have been presented in various dimensions to understand the current practices in the textile supply chain management and future recommendations for designers, product developers and managers from the supply chain management. Findings show that in the current practices of supply chain management, tech-pack is not communicating the sustainable requirements efficiently and there is a need to standardize the sustainable requisites for product development. For progression in sustainable supply chain management, designers and product developers are required to adopt the Higg index as a standard source of information to standardize the sustainable requirement for each stage of the supply chain.