Year-round energy savings - Adjustable side frames allow millimetre-precise gap adjustment to effectively block air leaks, delivering continuous energy savings, improved living comfort, and reduced heating costs. Flexible positioning - Pre-mounted side coverings provide a perfect window fit in minutes with no additional tools required, offering maximum flexibility and simple installation across a wide range of window types. Dust barrier - High-quality insulation material blocks pollen and fine dust, reduces wind noise, and improves indoor air quality. Seasonal temperature control - Enhances system performance with features that keep warmth inside during winter and block heat from outside in summer, enabling intelligent energy use without extra effort. Specifications and practical use - Compatible with a wide range of window types; designed for easy retrofit and reliable performance. - Material: high-quality insulation designed to minimize air infiltration and noise. - Performance: improves comfort, reduces drafts, and contributes to lower heating and cooling costs. Use scenarios - Renovating a drafty older home: seals gaps around windows to reduce heat loss and improve comfort without major construction work. - Multi-room installation in a retrofit project: tool-free, quick adjustments for different window sizes and types, speeding up refurbishment. - Allergy-prone or pollution-sensitive environments: reduces pollen and fine dust intrusion while lowering wind noise, supporting better indoor air quality.