Double insulation for year‑round efficiency Poly inner layer bonded to the outer cover for a true double barrier against drafts and heat transfer Improved inner material — not tin foil — for better durability and quieter performance Quilted poly/cotton outer cover is machine washable for easy care Key benefits Reduces heating costs in winter by sealing gaps around the air conditioner and lowering heat loss Lets you leave the A/C unit in place for the season so you do not need to remove and later reinstall the unit Provides a cleaner, more finished appearance than foil liners while offering improved insulation performance Function, material, and compatibility Function: insulated cover/jacket designed to wrap around a through‑wall or window A/C opening to block drafts, dust, and outside air Material: bonded poly insulation with a quilted poly/cotton outer cover that is washable Compatibility: fits units that match the listed inside dimensions. Please refer to the product listing for the exact inside dimensions to confirm fit Easy to install and maintain Simple assembly and convenient installation so you can put it on or remove it quickly for seasonal use Outer cover is machine washable for straightforward cleaning and long term upkeep Practical use scenarios 1) Winter energy savings — Install the insulated cover at the start of winter to reduce drafts and lower heating bills without removing the air conditioner 2) Renter convenience — Secure insulation and a neat finish when you cannot remove a window or wall A/C unit at the end of the cooling season 3) Off‑season protection — Use while the unit is not in use to keep dust, pests, and cold air out of the home What to check before ordering Verify the inside dimensions in the product listing to ensure a correct fit with your A/C unit If you need additional installation guidance, refer to the included instructions or product packaging for assembly steps