Conjugated polymer-based infrared electrochromics controls the radiative heat loss by modulating the carrier density and mid-IR reflectivity (thus the thermal emissivity, according to Kirchhoff's law) . However, most existing mid-IR electrochromic devices are fabricated on flat, planar surfaces, leaving largely unexplored applications on three-dimensional (3D) and curved objects. While planar substrates are ideal for visible light modulation, they are fundamentally incompatible with the requirements of mid-IR thermal management. As shown in Fig. , using a premade two-dimensional planar device to conform to a complexly curved object's surface without introducing folding or distortion is impossible. According to Gauss's Theorem Egregium , at any point on a curved surface with principal curvatures and , its κ