No more hot air inside: cloth window seals keep hot air out of your house, whether it's from outside or from portable air conditioners. Our window seals create a "closed environment" that keeps your rooms cooler for longer. Washable: A major update to our window seals, with better sealing and less air convection.The window seal kit can be hand washed or machine washed when it gets dirty or at the end of the AC season. Polyester material: Universal window sealing kits are made of durable polyester and will last for years. The window sealing kit is waterproof, preventing rain from entering the room from outside when you use the air conditioner on rainy days. Easy to install: No drilling required. Our window sealing kits are available for all your needs! Simply attach the tape to the inside of the window frame and to the window. Attach the window seal to the hook and loop tape.