This paper sets out the experiences of and critical reflections on devising and delivering a Masters level fashion education course in sustainability at London College of Fashion, UK. The course, first established in 2008, has been created from a collaborative, participatory, ecological paradigm and draws on an approach to fashion education that is oriented towards process, action and creative participation in all aspects of the transition to sustainability: social, environmental, economic. This stands in contrast to conventional educational models that concentrate on product or outcome and the preparation of students for economic life. The paper describes the Masters course's broad disciplinary approach and its theoretical framework, drawn from design for sustainability. Through reference to student work, the paper goes on to set out some of the opportunities and challenges that working in this way has presented, including among others; bridging of epistemological differences at an institutional level; new roles for designers working within a framework of sustainability; and emerging ways to visualize the process and practice of sustainability.