- Applicable Size: The cover fits most window air conditioners with inner dimensions of 21" x 15" x 3.5" (L x H x D), compatible with 6000BTU to 8000BTU models and units sized 19"-21" x 13"-15" x 3" (L x H x D). - Reduce Heating Costs: This indoor air conditioner cover features an embedded cotton lining that effectively prevents hot air from escaping and cold air from entering. By minimizing heat loss during winter, it contributes to lower heating expenses. - Innovative Design: The inner lining is crafted from waterproof fabric, protecting your air conditioner from humid air, thus ensuring optimal performance. A strategically placed hole at the bottom corner allows easy cable passage. - Secure Fit: Adjustable straps on both sides and elastic cords around the perimeter ensure a snug fit, keeping the cover securely in place. - Practical Applications: Ideal for seasonal use, this cover is perfect for protecting your air conditioner during winter months. It also aids in maintaining efficiency in off-seasons by shielding the unit from dust and moisture. Easy to install without any tools—simply slide it over your air conditioner for hassle-free protection. - First-Class Quality: Combining comfort and practicality, this AC cover is designed to safeguard your investment while enhancing energy efficiency.