Efficient airtight sealing Designed for precise seam fit and equipped with an adjustable frame, these side panels provide strong airtight sealing to prevent air leaks and maximize energy savings in every season. Dirt and pollen protection Blocks pollen and dust ingress while remaining wind- and noise-resistant. Supported by effective insulating material, it delivers consistent airtight sealing for reliable performance. Flexible placement and installation Achieve a seamless window fit in minutes with the pre-installed side walls. No extra tools are required, and the installation process is simplified for maximum convenience. Smart Climate Control Reduces electrical load while delivering intelligent climate protection to store winter warmth and block heat in hot weather, ensuring comfort and energy savings with ease. Practical use scenarios - Winter energy efficiency: Use in cold seasons to minimize heat loss and lower heating costs without sacrificing comfort. - Allergy and dust control: Helps keep pollen and dust outside, improving indoor air quality in homes near gardens or busy streets. - Quick, tool-free retrofits: Ideal for seasonal homes, rentals, or multi-family buildings where fast, hassle-free installation is beneficial.