Highly efficient subambient all-day passive radiative cooling textiles with optically responsive MgO embedded in porous cellulose acetate polymer

•A highly efficient subambient all-day PRC textile is fabricated.•Cooling power reaches 117.8 and 156.1 W m−2 during daytime and nighttime.•A subambient temperature reduction of 8 °C under direct sunlight is achieved.•Compared to normal textile, the PRC textile enables a simulated skin decrease 11 °C.•PRC textile can enhance the thermoelectricity generation performance.