Energy Saving for All Year Round Combines precise sealing technology to stop air leakage, reduces energy consumption year after year, and provides a flexible frame adjustment mechanism for seamless integration and consistent results. Efficient Environment Shield Provides good resistance to wind and pollen with an excellent construction that supports stable temperatures and minimizes noise for a quiet atmosphere. Quick and Easy Setup With pre-assembled side panels, this design fits onto a clip or flat window, allowing users to complete the configuration in minutes. Thermal Barrier Panels With dual layer insulation, these panels effectively block heat and stabilize the indoor environment and extend the life of your AC USEAL systems. Use scenarios - Living room or bedroom with a window air conditioner: reduce drafts, lower energy use, and maintain steady temperatures year round. - Home office in a noisy or windy location: minimize outside noise and stabilize comfort for work. - Pollen-prone seasons in spring: block pollen while preserving interior temperature control.