<p>Organic Phase Change Materials (PCMs) are derived from renewable resources such as plant oils and fatty acids. These additive functional materials are especially a sustainable alternative to inorganic PCMs. These functional materials ensure effective thermal regulation that enhances comfort in a wide range of clothing, such as active wear, thermal clothing, and home textiles. This review discusses the thermal properties of these organic PCMs, focusing on their ability to absorb, store, and release heat, thereby contributing to improved microclimates within textiles. It also analyzes various encapsulation techniques that ensure the stability and compatibility of organic PCMs when encapsulated in textiles. However, challenges remain, including issues related to the durability of these materials under repeated washing and wear, as well as the need for greater consumer awareness and acceptance of more sustainable textile innovations. This review also emphasizes the importance of technological advancements for scaling production and enhancing the commercialization of organic PCMs in textile applications. Opportunities for eco-innovation are significant, particularly in the realm of smart textiles, which can dynamically respond to environmental changes, thereby improving the wearer’s experience. It also discusses the prominent role of organic PCMs in advancing sustainability in the apparel industry while addressing consumer demands for high-performance, multifunctional clothing, thereby opening new windows for a more environmentally sustainable future in the clothing industry.</p> Graphical abstract <p></p>