In the realms of smart wearables and personal thermal management, phase change materials (PCMs) stand out as a groundbreaking innovation. These materials possess the unique ability to absorb or release significant quantities of thermal energy at precise temperatures, thereby bestowing fabrics with "thermal buffering" capabilities. Nevertheless, their practical deployment is hindered by a conundrum: a high energy storage density frequently results in compromised mechanical properties, vulnerability to leakage, and insufficient thermal conductivity. Conversely, bolstering structural stability often entails a trade-off in terms of reduced heat storage capacity. Traditional phase change fibers may encounter challenges such as leakage, low tensile strength, and processing complexities, or they may compromise heat storage capacity to attain mechanical robustness, thereby severely impeding their widespread adoption in wearable devices. Hence, achieving a harmonious balance and optimizing core performance through structural innovation has emerged as a pivotal challenge demanding urgent resolution in this domain.