Secure window fit: The kit uses a stable mounting design that sits firmly against the window frame to resist strong wind intrusion and maintain a reliable seal. Adjustable fit for many window sizes: Elastic construction adapts to a wide range of window widths, delivering a snug fit without tools or complicated setup. Consistent climate sealing: Reduces external heat entry and drafts, helping maintain a stable indoor temperature and improve energy efficiency. Quick installation: Unfold, tighten the drawstring, and attach the fixing strip for fast, tool installation. Durable materials: Made from a durable, flexible fabric with reinforced edges and sealing components for longlasting performance. Use scenarios Seal drafty living room or bedroom windows in winter to cut heating costs and improve comfort. Ideal for rental apartments with varied window sizes, allowing one kit to cover multiple rooms. Helpful during seasonal changes or renovations to seal gaps around kitchens, bathrooms, or sunrooms and maintain consistent temperatures.