The holes in this portable dryer vent set can be secured with a drawstring, which helps prevents air from going back inside, blocking heat and keeping room cool Constructed from polyester fiber, which is stable to use, safe and sturdy, not easy to break, and effective against wind, which makes it a long term companion Designed as a general purpose connector for portable air conditioners exhaust hoses and window sealing panels, this adapter helps establish a stable exhaust channel quickly Designed around exhaust hose connection needs, this adapter enhances interface fit to minimize hot air backflow from none stable Easy Installation: Features an intuitive structure with simple steps for basic connection without complex modifications, lowering the first time installation barrier, Manufacturer: Kaeltsyn