Optimal Fit for Window Units: Specifically designed to fit window air conditioner units measuring up to 19-21 inches in length, 13-15 inches in height, and 3.5 inches in depth. This cover ensures a snug fit with an adjustable drawstring and an additional free drawstring to secure it perfectly. Enhanced Energy Efficiency: Crafted with a double layer of Polyester and embedded cotton, this indoor AC cover effectively blocks warm air from escaping and prevents cold drafts from entering. This feature helps reduce heating costs during the colder months by maintaining your room's warmth. Installation Made Simple: This air conditioner cover can be installed effortlessly without the need for any tools. Just slip the cover over your AC unit and tighten it using the adjustable drawstring. The straightforward design ensures that anyone can secure the cover in place quickly and easily. Designed for Convenience and Aesthetics: The cover includes two strategically placed holes at the bottom corners to accommodate the air conditioner's power cable. This thoughtful design not only looks neat but also eliminates any hassle related to the power cable management. Comprehensive Protection for Your AC: Protect your air conditioner from dust, dirt, and other small debris during off-seasons with this cover. The inner lining is made from water-resistant fabric to block humidity and keep your unit in pristine condition. Additionally, the cover is machine washable and reusable, ensuring long-term usability. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Light Gray Material:Oxford cloth + cotton Size:about 53x38x9cm Package Contents: 1 * Indoor Air Conditioner Cover