This article presents a novel transparent radiative cooling metamaterial designed as a cover window for foldable and flexible electronic displays. The metamaterial, made from clear polyimide (c-PI) with embedded optically modulating microstructures of PMMA-infiltrated silica aerogel microparticles, achieves high optical transparency (85.5% visible transmission) and excellent radiative cooling performance. The material's unique design allows for a thickness of only 50 microns, making it suitable for foldable and flexible displays. The metamaterial not only maintains optical transparency but also provides enhanced mechanical and moisture-impermeable properties, crucial for protecting the underlying electronics from environmental factors. The metamaterial's radiative cooling functionality is achieved through the combination of silica microstructures and PMMA, which enhances light emission in the atmospheric window (8–13 μm) while maintaining high visible transparency. This results in a significant reduction in temperature rise of the underlying devices, both in indoor and outdoor environments. The material's performance was tested under various conditions, including solar irradiance and high humidity, demonstrating its effectiveness in managing heat dissipation. The study also highlights the importance of optimizing the material's properties to meet the specific requirements of foldable and flexible displays. The metamaterial's ability to suppress temperature rise and enhance light emission makes it a promising solution for improving the thermal management of high-performance electronic devices. The results show that the metamaterial can effectively reduce the temperature of displays by up to 8.3°C under outdoor conditions and by 6.9°C under indoor conditions. Additionally, the material's integration with light-emitting diodes (LEDs) significantly enhances their light output power, demonstrating its potential for use in flexible and foldable displays. The study concludes that the proposed transparent radiative cooling metamaterial offers a viable solution for managing heat in foldable and flexible electronic displays, combining high optical transparency with effective thermal management. The material's unique properties make it suitable for a wide range of applications, including flexible and foldable displays, where thermal management is critical. The research underscores the importance of developing materials that can meet the demanding requirements of modern flexible electronics while maintaining optical and mechanical performance.This article presents a novel transparent radiative cooling metamaterial designed as a cover window for foldable and flexible electronic displays. The metamaterial, made from clear polyimide (c-PI) with embedded optically modulating microstructures of PMMA-infiltrated silica aerogel microparticles, achieves high optical transparency (85.5% visible transmission) and excellent radiative cooling performance. The material's unique design allows for a thickness of only 50 microns, making it suitable for foldable and flexible displays. The metamaterial not only maintains optical transparency but also provides enhanced mechanical and moisture-impermeable properties, crucial for protecting the underlying electronics from environmental factors. The metamaterial's radiative cooling functionality is achieved through the combination of silica microstructures and PMMA, which enhances light emission in the atmospheric window (8–13 μm) while maintaining high visible transparency. This results in a significant reduction in temperature rise of the underlying devices, both in indoor and outdoor environments. The material's performance was tested under various conditions, including solar irradiance and high humidity, demonstrating its effectiveness in managing heat dissipation. The study also highlights the importance of optimizing the material's properties to meet the specific requirements of foldable and flexible displays. The metamaterial's ability to suppress temperature rise and enhance light emission makes it a promising solution for improving the thermal management of high-performance electronic devices. The results show that the metamaterial can effectively reduce the temperature of displays by up to 8.3°C under outdoor conditions and by 6.9°C under indoor conditions. Additionally, the material's integration with light-emitting diodes (LEDs) significantly enhances their light output power, demonstrating its potential for use in flexible and foldable displays. The study concludes that the proposed transparent radiative cooling metamaterial offers a viable solution for managing heat in foldable and flexible electronic displays, combining high optical transparency with effective thermal management. The material's unique properties make it suitable for a wide range of applications, including flexible and foldable displays, where thermal management is critical. The research underscores the importance of developing materials that can meet the demanding requirements of modern flexible electronics while maintaining optical and mechanical performance.