Adjustable size: available in two lengths, about 300 cm or about 400 cm, and can be trimmed to fit smaller gaps. Fits all sliding doors or windows (horizontal or vertical) and is compatible with any portable air conditioner or air dryer. Prevents air leakage and improves efficiency: made from TU fabric with a heat insulating treatment. Blocks cold air from escaping and reflects heat outside, helping the room cool faster and reducing energy use. Complete sealing and protection: delivers tight, gap installation with a durable material and strong adhesive strip. Prevents cold air loss and helps keep insects out. Precise build for reliable fit: precision cut and routed areas allow easy adjustment without distortion. Texture near the outlet reduces tape slip after inserting the hose and minimizes gaps. Practical use scenarios: in a living room with a sliding balcony door to keep cool air inside; in a small office with a portable AC to reduce drafts; in a camper or RV with sliding panels to maintain cabin temperature.