The research presents a decision-support framework, based on environmental performance and sustainable development commitment, to select suppliers in the textile industry. The framework is to be applied during the preliminary onboarding process of new suppliers. The framework is addressed at multi-tier supply chains and is aimed at preventing sustainability-related risks in supply chains, while promoting beneficial collaboration with suppliers. For this purpose, a multi-step evaluation process was developed, based on a quantitative evaluation of suppliers’ environmental performance. The supplier selection model finds an operative application in the textile industry, and a case study analysis was performed on behalf of Benetton Group, a multinational fashion brand.