Polaris 3900 Sport SuperBag 39-310The Polaris Zodiac 39 310 is a replacement filtration bag, known as the gray double Superbag, designated for use with the Polaris 3900 Sport pool cleaner. It is constructed with dual zippered chambers, allowing it to handle up to 5 liters of debris, both large and small. This Superbag is primarily compatible with the Polaris 3900 Sport model but also fits other models like the Polaris 280 and P39.