1. Easy installation: no drill holes and no tools required. Simply stick the portable air conditioner window seal to the inside of the window frame and window, place the hose of the air conditioner on the outside of the window, tighten the zip and then attach it with a tape. You can open or close the window at any time without removing the window seals. 2. To love the environment This portable window seal air conditioner is installed by a hose between the window frame and the window to effectively remove the hot air generated by the air conditioner from the window and keep the cool air inside, so that your room stays cool for a long time, reducing energy consumption and CO2 emissions, which helps you save on power consumption and money. 3. Efficient cooling: the climate window seal is made of durable polyester material, which can effectively block the penetration of hot air and quickly cool your room in a short time. This improves the cooling performance of the air conditioner. 4. Perfect choice for sealing: the seal of the air conditioner is made of waterproof polyester material, which can be used even on rainy days. The window seal not only regulates air exchange inside and outside the airconditioned room, but also protects the cool indoor climate from dust and dirt, strong wind, sudden rain and insects.