Circular textiles aim to create a closed-loop system of “from textile to textile,” ensuring resources are continuously reused within the textile industry. While this goal has not yet been fully achieved, current efforts are categorized into two areas: Sustainable Production, which focuses on using eco-friendly materials and low-carbon manufacturing processes; and Sustainable Use & Recycling, which emphasizes extending product lifespans and designing single-material products for easy recycling to minimize waste, reduce carbon emissions, and advance the textile industry toward a circular economy.