This paper examines how designers engage with sustainable materials through a practice-based methodology that integrates reflection, experimentation, and material understanding. It repositions sustainability not as a static design objective, but as a dynamic, iterative process that emerges through the act of making. By engaging with renewable, bio-based, and waste-derived materials, the research demonstrates how creative practice fosters ecological literacy and responsible production. Drawing upon design research and case-based evidence, this study argues that sustainability evolves from experiential learning, material dialogue, and systemic thinking rather than prescriptive frameworks. The outcomes emphasize the designer’s evolving role as a mediator between creativity, ecology, and technology.