- Efficient and easy installation. Designed for swinging sash windows with a circumference of 380 cm or 460 cm. To install, measure the four sides of the opening, attach the adhesive tape to the frame, and secure the conditioning seal so warm indoor air cannot re-enter and the exhaust hose vents to the outside. No special tools or complicated steps required. - Secure and reliable design. Extra-strong closures hold the hose in place and do not auto-open during use. Reusable cable ties are included for additional support. Helps prevent entry of dust and drafts and reduces moisture entering the room, providing a secure, comfortable environment. - Compatibility and durability. Suitable for both single and dual hose portable air conditioners from various manufacturers. Made from thickened polyester with a silver coating, highly water resistant, and easy to clean by washing at 40C. Built for long-lasting performance. - Functional and practical. Besides sealing the unit, it offers moisture control and improved air quality for indoor spaces. A reliable accessory for portable air conditioners that maintains insulation and comfort. - Use scenarios. - Cooling a living room with a swinging sash window while keeping warm air and outdoor moisture out. - Temporary cooling in rentals or apartments with sash windows, where tool-free, secure sealing is beneficial. - Any room using a single- or dual-hose portable AC needing a clean, outside exhaust path while preventing indoor air leakage.