Layered Insulated Outdoor Window Air Conditioning Case: Our outer cover for window air conditioner is made of 2 layers, 1st layer 420d high quality waterproof Oxford, 2nd layer is silver UV protection layer, water, rain, land resistant and significantly reduces the cost of heating in winter. Design against explosion for the outer window air conditioning case: Our outer window air conditioning case for winter contains 2 nylon tapes to help fix the case firmly. All air conditioning cases for the outer wall unit can be washed and reused in the machine Outdoor Case for Window Air Conditioning Units: Our cases for the outside of the window air conditioning unit have 4 dimensions and are suitable for most standard window air conditioning, please measure your air conditioner before buying and select the most suitable size Dustproofing cover for the suitable external air conditioning unit for the bedroom living room apartment: You do not need to remove your air conditioning unit every winter. This outdoor cover for the window allows you to leave your air conditioning unit in the window all year round After-s : If you are not satisfied with our air conditioning covers for window units, please us at any time by e-mail, we will answer you within 24 hours.