85 thousand tons of plastic bags per year are thrown into the Indonesian ocean. It is concerning because plastic bags will decay over time and break down into microplastics which can harm marine life. Upcycling is one of the ways to reduce plastic waste to turn into useful products and increase material value. In this regard, consumer interest in sustainable fashion products has also increased in recent years. One of the techniques used to upcycle plastic bags is the heatpress technique, which is applying heat and pressure to plastic bags, so they become stronger sheet material. This technique has the potential to be used as a bag material because its characteristics are flexible, strong and have a unique texture. However, the treatment of upcycled plastic bag sheet material has not been explored further. In this design process, further exploration was carried out on upcycling plastic bag sheet materials using various techniques, as well as its application to bag products targetted for women aged 40-50 years, with the concepts of “Preppy”, “Timeless”, and “Craftmanship” with the aim of increasing value aesthetics and selling value.