All‐in‐One Cooling Metafabric With Honeycomb‐Like Networks for Personal Thermo‐Moisture Comfort

Personal thermal management textiles offer an environmentally benign and individually adaptive strategy to safeguard human health amid the escalating summer heatwaves. Despite significant advances, state‐of‐the‐art cooling fabrics remain hampered by single‐mode heat dissipation, disregard for sweat management, and cumbersome fabrication processes that severely constrain cooling performance improvements and render their widespread application unattainable. Here, a honeycomb‐like network structured, all‐in‐one cooling metafabric integrating conduction, radiation, and evaporation functions is fabricated via a phase separation‐driven coating strategy. The high thermal conduction pathways, high refractive index, and superior backward scattering efficiency of boron nitride nanosheets, along with the unique Janus structure, respectively confer upon the metafabric horizontal and vertical high thermal conductivities (1.39 and 0.08 W m −1 K −1 , respectively), robust solar reflectivity (92.82%), and exceptional moisture evaporation performance (0.40 g h −1 ), thus enabling the metafabric to achieve an 8 °C cooling efficacy relative to cotton fabric. Owing to the scalable solution‐based manufacturing, this robust, high‐performance cooling metafabric holds promise for large‐scale deployment in various scenarios.