Adjustable fit for most window air conditioner units: This indoor air conditioner cover is designed with an adjustable size to fit a wide range of window unit models, providing a snug and secure fit that stays in place with elastic straps and adjustable fasteners. Duallayer insulation for energy efficiency: Featuring a polyethylene inner lining and a soft polyester outer cover, this window unit cover helps prevent warm air from escaping and cold air from entering, reducing heating costs during winter. Secure attachment and easy installation: Equipped with 2 adjustable straps and an elastic band, this AC cover guarantees a tight fit that avoids falling off while remaining quick to put on or remove as needed. Longlasting and washable material: Made from durable polyester fabric in a classic grey color, this robust cover is machine washable and designed to blend seamlessly with your home decor. Use scenarios Winter energy savings: Install the cover when the window unit is not in use to minimize heat loss and improve room warmth. Seasonal protection and maintenance: Use yearround to protect the unit from dust and debris when cooling is not required. Drafty window environments: Helps reduce drafts around the window opening and contribute to overall energy efficiency in homes with drafty windows.