heavy-duty, tear-resistant, waterproof 600D fabric .[Three-Layer Insulation to Block Drafts]Unlike other single-layer covers, our window air conditioner cover uses a three-layer structure: 600D waterproof and windproof heavy-duty oxford material, 2mm thickened pearl cotton, insulated aluminum foil. .[Easy to Install]This window air conditioner cover for outdoor is 25.5"L x 20.5"H x 18"D, you just need to install it on your air conditioner and secure it with the adjustable straps. Please measure the size of your air conditioner before purchasing. .[Perfect for Window Air Conditioner with or without Brackets]With sewing thread at the bottom, the window air conditioner cover creates several cuttable areas, the seam will not come apart when you cut this area. Good for Window Air Conditioner with or without Brackets brackets. .[Adjustable Metal Buckle Strap]Compared to the fragile plastic buckles and flimsy straps used in other homes, we use metal buckles that will not break and stronger, reinforced straps that can withstand all weather conditions and are easier to install. .[All-Weather Protection]Our heavy-duty exterior window AC cover is designed to protect your air conditioning unit from harsh weather conditions.