Due to the advancement of technology, fashion styles become increasingly democratized and proliferated. Many consumers are contented with the up-to-dated styles, abundant choices, and affordable price. However, other consumers and environmental advocates began to question about this fast fashion model including the problems of overconsumption and disposable clothing. As a result, many fashion practitioners and scholars have been developing different methods to minimize the fabric waste (e.g., zero-fabric-waste design), and prolong the product life-span through innovative design. The objective of this research project is to design and develop a collection of transformable/detachable (T/D) garments to address some of the environmental issues. This study consists of three stages – experimental, production, and assessment. In stage one, several sustainable methods and T/D styles were developed. In stage two, the final concept was selected and a collection of four T/D styles were developed and produced. In the final stages, seven fashion professionals were recruited to evaluate each T/D style, and offer their feedback, opinions and recommendations about its desirability, practicality and effectiveness. In addition, T/D styles were posted online for public voting to rank their top three most favourable designs. According to our results, majority of the respondents supported the concept of sustainable fashion as well as the idea of transformable garments. However, they had a number of concerns regarding the production cost, practicality, and product commercialization. Nevertheless, it is worthwhile and imperative to rethink our current fashion system and explore different alternatives.