A new value proposition of wearable device is required. it is necessary to propose a human-wearing form factor in which user value(UX), design knowledge are linked. This paper includes research and experiment to develop personal cooling products that have a function of body temperature control by using flexible thermoelectric devices. For this purpose, band-type products were surveyed and classified into 6 categories. Surveys were conducted to investigate user s perception and emotion of each product category. Then, the usability evaluation was conducted through a competitive product. The user test was for the first impression and the wearing method of the competitive product and the second test for the problem through the user s autonomous use behavior. Experiments have led to major behavioral patterns such as attempting to wear first without looking at the instruction manual, taking about 20 seconds to try wearing with one hand, wearing the product backwards, and turning the product after wearing. The user behavior pattern derived from this analysis will be used as a major strategy and guide in designing future band-type cooling products through analysis. Future study to develop and design working mock up and usability test will be promising. This study is on wearable device using flexible thermoelectric element technology and considering UX for the first time