- Energy-saving solution: this air conditioner window seal improves energy efficiency by blocking backflow, preventing hot air from entering the room, and lowering power consumption. It is an environmentally friendly and cost-effective option that is easy to install and remove. - Windproof performance: made from high quality waterproof polyester, the seal is durable and provides reliable windproof protection against harsh weather conditions. - Easy installation: no drilling or tools required. Place the air conditioning hose in the window frame, unzip, tighten around the hose, and attach the window seal to the window. - All-season compatibility: designed for year-round use. Open or close your window in any weather without removing the seal, and reinstall next summer with ease. - Practical use scenarios: - In a home or apartment with a window AC unit, prevent warm outdoor air from leaking in and reduce cooling costs. - In a home office or bedroom, minimize drafts on windy days and maintain a stable indoor temperature. - During shoulder seasons, keep the room comfortable when the AC is not in use, then reseal quickly for next summer.