10 Frame Polystyrene VENTILATED Top Cover (does not include Mylar Inner Cover) [10PVT]

The ventilated polystyrene cover features four adjustable ventilation ports, each fitted with a removable polystyrene plug, allowing you to customize airflow as needed—from fully closed to fully open. The cover has an interior depth of approximately 1¾", making it an ideal space for emergency winter feeding, such as sugar bricks, the mountain camp method, or winter patties.