• • Ambient-pressure drying (APD) achieved only 8.9% shrinkage in ANF/CNT aerogel fibers, overcoming a key bottleneck of conventional freeze/supercritical drying and enabling scalable production.
• • Thermal conductivity of ANF/CNT aerogel textiles is 33.8–40.4 mW/(m K), providing superior passive insulation across a wide temperature range from −196 to 400 °C, suitable for extreme environments.
• • Synergistic passive insulation and active solar heating raised skin temperature by 5.9 °C, compared to 1.6 °C with passive insulation alone, demonstrating a 3.7-fold improvement in cold-weather performance.
• • The incorporation of CNT and Ca2+ crosslinking strengthens the nanofiber network, enabling structural integrity during APD and yielding flexible, mechanically robust, and flame-retardant aerogel fibers for wearable applications.