Keep your room cooler: Our air conditioning door seals allow hot air to escape from inside the room through the exhaust duct. Compatible with most mobile air conditioners and clothes dryers, this waterproof fabric helps insulate the room from hot air and sunlight, maintaining a cooler indoor environment, improving air conditioner efficiency, and helping prevent mosquitoes from entering so you can enjoy comfortable summer days. : The door seal is made of professional 210D polyester material with a waterproof and eco-friendly PU coating. Washable, reusable, insect and UV resistant, it provides protection against dust and rain, making it suitable for use in various weather conditions. Easy to install: No drilling required and no damage to surfaces. Simply attach the included Velcro strips using the strong adhesive backing to the edge of the door frame, connect the door seal to the Velcro, and secure the exhaust hose with a zip tie. Wide range of applications: This door seal is designed for use with mobile air conditioners and dryers, and fits most door types with a maximum size of 90x210 cm. Reusable Velcro: Featuring an enhanced hot melt adhesive, the Velcro provides a stronger, more durable bond compared to standard options, while leaving no residue when removed. When not in use, simply detach the seal and store it; the Velcro can remain in place for convenient seasonal use.