Adjustable sizes: about 300 cm or about 400 cm. It fits sliding windows or doors (horizontal or vertical) and works with most portable air conditioners or air dryers. Prevent cold air loss: made from specialized TU fabric with a heatinsulating treatment. It blocks cold air from escaping and reflects heat away from the room, helping the space cool faster and reducing energy costs. Complete sealing and protection: durable material with an expanded adhesive strip delivers a tight, gap fit. It prevents cold air leakage and also keeps insects out. Precise construction for reliable fit: exact cutting and routing allow easy adjustment without distortion. A textured area near the outlet keeps the hose in place after insertion, eliminating gaps. Practical use cases: Home: seal around a portable AC behind a sliding glass door to maintain a cooler living room. Office: improve cooling efficiency for rooms with glass partitions or sliding doors. Travel/mobility: install in RVs, campers, or dorm rooms with sliding windows to enhance comfort and reduce energy use.