Descripton: NO MORE HOT AIR INCOMES – Window seal keeps the warm air coming from the hose of your portable air conditioner away by locking the hose between the window frame and the window itself. Our window seal leaves out insects, mosquitoes, rain and crates a “closed environment” that keeps your room cool for longer. INCREASE COOLING PERFORMANCE – Enjoy a cooler environment in summer thanks ! Seals around your open window and then zips around the nozzle of your hose and blocks the return flow of warm air, so that your mobile air conditioning unit can be more efficient and cools your room in less time. .