Make from polyester, this window vent set is adjustable, fitting various window types such as sliding and casement window for sealing Cuttable design, flexible to adapt to different size of window, sliding door, air conditioning duct port and other condition Light weight and easy to fold, mobile use with air conditioning, not need for complex installation Portable air conditioning window set sealing solution to hot air from entering, enhancing your air conditioning ' s efficiency and keep your indoor environment cool and comfortable Suitable for all kind of portable air conditioners and tumble dryers, Manufacturer: Kaeltsyn