When you place your pump inside this nylon mesh bag (pump cozy) filled with polyester filter media , you protect against plugging from leaves, algae and other debris. The drawstring top with push button release makes for easy pump removal. Models available to fits around pump bodies up to 6 inches or 8 inches in diameter. Product Features: • Protect against plugging by creating a large surface area around the pump • Has a polyester filter media pad inside of a nylon mesh bag • Designed to fit all brands of small pumps • Drawstring top with push button release keeps the top closed around the pump yet makes for easy pump removal