Adjustable frame design An adaptable side panel frame provides an efficient airtight seal, blocks air leaks, and supports year‑round energy savings with precision engineering. Allergen protection system Stops pollen and dust from entering while delivering wind and noise resistance. Built with advanced insulating material to maintain a consistent airtight seal. Seamless installation Preinstalled side panels enable easy and swift mounting in your window within minutes for added functionality. AC expansion-reduction technology Minimizes the load on the air conditioner with intelligent design that protects against cold drafts in winter and excessive heat in warm months, improving overall efficiency. Material and performance Constructed with advanced insulating material to support durable, reliable airtight sealing and steady performance across seasons. Use scenarios - Energy-minded homes: Ideal for living rooms or common areas where reducing utility bills and maintaining a steady indoor climate matter year round. - Allergy seasons: Helps minimize pollen and dust entry in bedrooms or nurseries, while reducing wind and noise intrusion for a calmer interior. - Urban or variable climates: Suitable for windows near busy streets or in climates with wide temperature swings, providing consistent comfort and improved cooling/heating efficiency. Notes Designed to work as a window retrofit solution with an adjustable side panel frame, offering airtight sealing, allergen protection, easy installation, and climate-control efficiency enhancements.