The Swimming Pool Filter is made from heavy-duty polyester and is designed to last far longer than cheaper alternatives, while having more pleats to improve filtering capacity. filters are made in the USA for the highest possible quality, allowing you to buy with confidence.cartridge filters feature reemay material that is sure to surpass all of your filtering expectations. has proven to be the cartridge of choice in the pool and spa industry by winning numerous awards for their excellent quality and performance. Note: Product has blue top end cap and orange bottom end cap.1 Buy = 2 Filter Cartridges!