The purpose of this study is to illustrate the design of safety suits based on energy-harvesting technology, particularly targeting street cleaners who must work at night with high mobility. The design focuses on applying lightweight energyharvesting tools and illuminant into the wear. The design development reflects feedback from testers collected via survey constituting a key methodology. The development process has two main stages. Each stage uses a process of design prototyping, internal examination, test sampling, test wearing, and wearers’ feedback via survey that consists of questions on visibility, wearing convenience, and washability. The first stage results show the design of safety suits with energy-harvested LED illuminant inserted and the survey results collected from street cleaners dressed in 4 sample and 80 actual suits in total. Improved based on the first-stage survey results, the second stage designs the suits with detachable energy-harvested EL tape. From these 5 sample and 30 actual second-stage suits, the additional survey indicates that this second-stage design facilitates more visibility and convenience in washing and wearing than the first-stage design. Accordingly, one can expect that this new design can apply not only to safety suits for night workers but also to handicapped or outdoor sportswear applications in the future.

Abstract
 I. Introduction
 Ⅱ. Background
  1. Safety apparel for street cleaner
  2. Energy-harvesting
 Ⅲ. Methods
 Ⅳ. Design Development
  1. First design step
  2. Second design step
 Ⅴ. Conclusion
 References

• Jung-A Yoon(Concurrent Professor, Dept. of Clothing & Textiles, Hanyang University, Korea, 한양대학교 의류학과 겸임교수) | 윤정아
• Yujin Oh(Doctoral Course, Dept. of Clothing & Textiles, Hanyang University, Korea, 한양대학교 의류학과 박사과정) | 오유진
• Hwawon Oh(Doctoral Course, Dept. of Clothing & Textiles, Hanyang University, Korea, 한양대학교 의류학과 박사과정) | 오화원
• Younhee Lee(Professor, Dept. of Clothing & Textiles, Hanyang University, Korea, 한양대학교 의류학과 교수) | 이연희 Corresponding author