This window sealing kit improves cooling efficiency and blocks heat gain with a durable, adjustable barrier. It fits inward and outward opening windows and adapts to single or double vent setups, with a perimeter fit up to 300 cm after you verify dimensions. Enhanced cooling efficiency: A tight sealed barrier minimizes cold air loss and blocks warm air entry, helping your AC run more efficiently. Flexible compatibility: Designed for inward or outward opening windows; supports single or double vent configurations; adjustable to window perimeters up to 300 cm after confirming measurements. Durable, weatherready material: Waterproof fabric reduces heat transfer, resists weather exposure, keeps the interior dry, and provides UV protection for longer life. Easy installation and removal: No drilling required; uses a zipperandtape system for a quick threestep setup; easy to store when not in use. Use scenarios Living room or bedroom with vented windows in hot weather to lower cooling load. Apartments with large perimeter windows needing temporary sealing during rain or humidity. Kitchens or sunrooms with outwardopening windows to reduce heat during cooking.