Made in the USA of Excelsior, use these pads to line your nesting bays. Makes for easy clean-up. Just remove and discard the pad. The pad draws moisture from the droppings which draw to the paper liner. They also helps provide cleaner, fresher better quality and more hatchable eggs. These can also be used in coop trays. Change pads every 5-7 days, depending on use. Includes 4 packs of 7 pads each for a total of 28 pads.