The KN95 Anti-Particulate 5-Layer Masks 50pc in Single Pack are high-quality disposable face masks that meet the GB2626-2019 standard. These masks are designed to filter out airborne particles and provide a secure fit for optimal protection. With 5 layers of filtration, these masks offer a high level of filtration efficiency, making them suitable for use in various settings including healthcare, industrial, and lab environments. The pack of 50 ensures that you have an ample supply for extended use.