Window Air Conditioner Covers for Outside Unit for Winter Insulation, 21 W x 16 D x 15 H, Waterproof & Windfroof AC Covers for O

?Three Layers of Insulation for Draft Blocking?Unlike other single-layer AC covers, TOHONFOOs air conditioner covers for outside units features a three-layer structure: 600D waterproof and windproof heavy duty oxford fabric, 2mm thickened pearl cotton, and insulated aluminum foil | ?Please Choose the Right Size?The inner dimensions of the ac unit covers outdoor are 21W x 16D x 15H, fitting most AC units with outer dimensions of =20.5W x 15.5D x 14.5H. Note: Please measure your unit before purchasing | ?Bottom-cut Design for Bracket Compatibility?The sewing threads at the bottom of the window air conditioner cover form several cuttable sections. If your unit has a support bracket underneath, you can easily cut the bottom of the ac cover for outside unit to accommodate it | ?Metal Buckle Adjustable Strap?Compared to the breakable plastic buckles and flimsy straps used in others, we use durable metal buckles that wont break and reinforced straps that can withstand harsh weather while being easier to install | ?All Weather Protection? Our waterproof heavy-duty air conditioner covers for window units are designed to protect your air conditioning unit from harsh weather conditions