This mask has five layer filter protection to the children who are more vulnerable to air pollution which can cause, bronchitis, chest, respiratory problem, eye, skin, heart, and mental problem. This filtrationprovides full protection if used properly and airtight. Ensure the mask is airtight Insert filter inside the mask Remove filter while washing it. Change filter when it is time to change filter as per the pollution level This mask has five layer protection to the children who are more vulnerable to air pollution which can cause, bronchitis, chest, respiratory problem, eye, skin, heart, and mental problem. This filtrationprovides full protection if used properly and airtight. Brand No Brand SKU OT776HB0PRYPONAFAMZ-247059 Model N95 Mask