Waterproof & Sturdy Material: Crafted from robust, waterproof polyester, the seal stands up to summer storms and daily use. It's also easy to clean and built to last season after season. Enhanced Cooling Efficiency: The seal effectively locks in cold air and blocks hot air from entering the room, helping your air conditioner cool the space faster and maintain a steady temperature. Double Hose Design: Equipped with two secure hose openings, this window seal works with single or dual-hose AC units. The adjustable zippers ensure a snug fit around the hoses to prevent leaks. Fit for Tilt: Ideal for all common tilting and sloping. Whether in apartments, RVs, or attics, this window seal adapts to your needs for better air conditioning performance. Easy Installation: No drilling or tools required. Just attach the seal to the window frame, pass the hose(s) through the drawstring ports.