NICENEEDED Square Fan Mesh Covers (Not including the fan), White Reusable Washable Protector for Finger Protector, Industrial Fan Cover Safety Fans Covers

["Material: This fan cover is made of polyester mesh fabric, specifically designed for square window fans (cover only), offering excellent breathability and dust protection","Adjustable Drawstring: The back features an adjustable drawstring design, allowing users to flexibly adjust the tightness based on the fan’s thickness to ensure a snug fit and prevent slipping","Easy to Install: The fan cover is very easy to install and remove without tools, making it ideal for everyday household use. Simply wash and air-dry for reuse","Fits Most 20-Inch Square Fans: This product is custom-made for 20-inch square fans, with precise dimensions that fit a wide range of models","Reusable: The fan cover is made of lightweight, soft material that folds easily for storage. The elastic fabric is durable and supports long-term reuse, making it an ideal dust-proof accessory for homes and other settings"]