【SIZE OPTIONS】Choose from four sizes (Length x Height x Depth): 17"x13"x3.5", 21"x15"x3.5", 25"x18"x3.5", and 28"x20"x3.5". These sizes are designed to accommodate most window air conditioners ranging from 5,000 to 22,000 BTUs. 【PREMIUM MATERIALS】Our window AC cover is expertly crafted from waterproof fabric and features a dense cotton padding. We've reinforced the fabric and lining to boost its water resistance. Plus, we've added extra cotton padding to keep cold air out of your room effectively. 【DUST PROTECTION】This cover prevents dust from clogging your A/C unit when it's not in use. It's machine washable and reusable, saving you the hassle of removing the air conditioner from your windowsill every autumn and winter. 【EASY INSTALLATION】Putting the indoor AC cover in place is a breeze. The elastic on both sides and the adjustable fastener strap make it easy to secure the cover around your window air conditione 【CORD MANAGEMENT】Based on customer needs, we've added Velcro openings on both bottom sides. If necessary, you can thread the air conditioner cord through any of the openings. Indoor Air Conditioner Cover for Window Units, Inside Window AC Cover for Winter, fits up to 17"x13"x3