Lung Chow, Jianpeng Zhang, Zehua Peng, D. Ye, Binbin Zhang, Jian Li, Jian Li, Woo‐Young Park, Chentao Du, Xingcan Huang, Chun Ki Yiu, Yuze Qiu, Jingkun Zhou, Zhenlin Chen, Yuyu Gao, Weibin Zhu, Pengcheng Wu, Guangyao Zhao, Qiang Zhang, Yuan Guo, Zuowei Sun, Zhan Shen, Shuaiqi Ren, Sang Min Won, Jiyu Li, Jiyu Li, Xinge Yu
ABSTRACT Textiles are ideal platforms for wearable electronics due to their inherent softness and superior thermophysiological comfort. However, conventional textiles prioritize wearer comfort at the cost of the stringent thermal‐optical demands imposed by embedded electronics, often sacrificing scalability, breathability, electronic integrability, device performance, and user safety. Here, we report a wearable tailored passive radiative cooling textile (WRCT) for seamless integration of flexible electronics. The WRCT was fabricated via a scalable, one‐step, and additive‐free wet‐spinning technique. Hierarchical phase inversion kinetics create microfibers with multiscale porosity and surface nodules, achieving solar reflectance (>95%) and mid‐infrared emissivity (0.96). This single‐material platform satisfies the conflicting requirements of wearing comfort and electronic functionality by providing breathability, flexibility, and passive daytime thermal management. These properties thermally decouple electronics from the skin and keep skin temperature below 41°C even under intense sunlight (500 W/m 2 ) combined with a localized heat load equivalent to a heat flux of approximately 17 kW/m 2 over a 142 mm 2 area, simulating high‐power microcontrollers, conditions that cause low‐temperature burns within minutes on conventional textiles. By converting a commodity polymer into an advanced thermal‐optical regulator through a mature and scalable fiber‐production process, this textile establishes a practical, safe, and manufacturable foundation for reliable, all‐day wearable electronic systems.