Effective air blockage: seals the gap between your mobile/portable air conditioner exhaust and the window frame to reduce warm air coming in and cold air escaping. Keeps indoor temperature more consistent during hot weather. Energy-conscious performance: by minimizing cold air leakage, the baffle helps your air conditioner run more efficiently and can potentially reduce electricity use and cooling costs. Durable waterproof material: made from robust polyester with a waterproof finish to resist rain and moisture at the window opening. Insect and weather protection: also helps keep unwanted insects and drafts out of the living space around the window installation. Designed for portable AC setups: intended for use around mobile or portable air conditioner window fittings and the gaps between windows and frames; adaptable to typical residential and small-space window openings. How it solves common problems Stops warm outdoor air from undermining your air conditioner so the room reaches and holds your set temperature more reliably. Reduces the need for your unit to run continuously, supporting energy efficiency and more comfortable indoor conditions. Keeps rain and insects from entering where the window and AC exhaust meet, improving comfort and cleanliness. Material and performance Material: robust polyester with a waterproof surface for longer wear in a window environment. Function: seals gaps between window and frame around the portable AC exhaust to limit air exchange and exposure to weather and pests. Performance: effective air blockage and reduced cold-air leakage when installed correctly; results depend on window/installation specifics. Practical applications Home bedrooms and living rooms with a portable air conditioner and a window exhaust panel. Small offices or workspaces where a window-mounted portable AC is used and draft/weather protection is needed. Temporary or seasonal cooling setups in apartments, guestrooms, or short-term rentals where gaps around the window AC need sealing. Notes Intended for use with mobile/portable air conditioner window installations and standard window-frame gaps. Performance depends on correct placement and compatibility with your specific window and AC configuration.