Efficient Heat Insulation - Blocks outdoor hot air entry and seals hoses to the window frame - Directs indoor heat outward for consistent comfort Enhanced Air Isolation - Minimizes cooling capacity loss by isolating indoor-outdoor air exchange - Improves AC efficiency and supports energy conservation during use Waterproof Protection - Made with robust waterproof materials - Resists rainwater intrusion and performs reliably in wet and rainy conditions Dependable Setup - Easy window operation with a portable air conditioner window seal kit - Installation via double fixing of bonding and zipper - No tools or destructive modifications required Use scenarios - Use in living rooms or bedrooms with a portable AC to maintain steady cooling by blocking heat and sealing the exhaust to the outside - Use in rainy seasons or wet climates to prevent rainwater intrusion while the unit runs - Use in rental spaces or temporary setups where permanent window changes are not allowed, with quick, tool-free installation and removability