window insulation kit is suitable for winter wind/cold to prevent heat loss. It can be installed on Windows to prevent cold air from entering the room and warm air from leaving the room, saving indoor heating costs in winter, and can also be used to prevent heat from entering the room in summer.For daily use, just wipe with a damp cloth to remove dust. When cleaning, remove it from the window, rinse it, and place it back on the window to dry!