These days, the lifestyle of staycation, a holiday in which an individual or family stays and relaxes at home, or possibly taking day trips to local parks and museums and so on, has increased. For this reason, the market of loungewear has expanded and the meaning of it has developed as a separate home-wear. According to the reflection of this trend, various kinds of loungewear are sold from the internal and external brands; however, most of these loungewears are home-wear and have a training look where esthetic designs are needed. This study is done to benefit those who prefer organic products, known as LOHAS trend. In addition, we developed the loungewear fashion design products, which reflect the LOHAS trend that uses organic cotton for the S/S collection of 2012. The formation of space between body and textile by pleats in these designs on pants, skirts, tops, sleeves, capes connote the meaning of loungewear that give the wearers comfort. As a result of this study, we have reached these final conclusions. First, loungewear is suitable for featuring the human body structure. Second, organic costumes can be preferable and become superior if it combines both functional and aesthetic appreciations. Third, eco-costumes can become more of a formal wear as eco-design achieves qualitative improvement.