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 summer heat, maintains cool indoor temperatures, improves air conditioner efficiency, and helps prevent mosquitoes from entering, so you can enjoy a comfortable summer. : The door seal is made of 210D polyester with a waterproof and eco-friendly PU coating. Washable and reusable, it is resistant to insects and UV rays, and provides effective protection against dust and rain, making it suitable for use in wet 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 door frame, connect the door seal to the Velcro, and secure the exhaust hose with the provided zip tie. Wide range of applications: This door seal is designed for use with mobile air conditioners and dryers, and fits most doors with a maximum size of 90x210 cm. Reusable Velcro: Instead of standard Velcro, we use an enhanced hot melt adhesive that provides stronger, more durable bonding 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 reuse next season.