The Kosette Care PM 2.5 Filter 5 Layer Carbon Lot Of 5 is a high-quality personal protective equipment product designed for use in masks and respirators. Each bag contains 24 filters, providing a total of 120 filters for extended use. The 5 layer carbon filter effectively captures PM 2.5 particles, making it an essential component for maintaining safety and health in various industrial and business settings. With the trusted brand of Kosette, you can rely on the quality and performance of these filter cartridges.