Efficient Cooling Block the return flow of warm air and improve the efficiency of your portable air conditioner or tumble dryer. The seal helps the room cool down faster, creating a more comfortable environment. Size Available in 200 cm and 300 cm lengths, the seal fits a wide range of portable air conditioners, dryers, exhaust dryers, and dehumidifiers. It is a versatile solution for different appliances and types. Compatibility Designed for commonly-used tilting windows or wings that open to the left or right, as well as bottom-hung windows or skylights. Not compatible with sliding windows or doors. Adjustable and Waterproof The single-tube mobile air-conditioning sealing cloth features an adjustable tension rope and is made of waterproof polyester. It provides a secure, tight seal around the opening and helps prevent air leakage. Use scenarios - In hot weather, attach to a portable air conditioner to cool a bedroom or living space more efficiently. - Use with a tumble dryer or exhaust dryer to minimize warm air entering the room. - Use with a dehumidifier in damp areas to maintain a consistent indoor environment while reducing air leakage.