Great air leak protection - Blocks air leaks through precise seam adjustment. The adjustable panels provide a consistent airtight seal, improving heat regulation and reducing annual energy costs. Pollution protection function - Prevents pollen and dust from entering while providing wind and noise resistance, supported by effective insulation material, ensuring an airtight seal. Flexible placement - Achieve a seamless window fit in minutes with the pre-installed side panels, eliminating the need for additional tools and simplifying the installation process for maximum convenience. Energy efficient panels - Optimizes indoor conditions by reducing AC load and provides year-round benefits such as heat retention in winter and blocking heat in hot weather for even comfort. Practical applications - Living rooms or home offices with large sun facing windows can benefit from reduced heat gain and lower energy costs in summer. - Bedrooms in colder climates can maintain comfortable temperatures year round with improved heat retention. - Allergy prone homes in urban areas can limit pollen and dust entry while still reducing outdoor noise.