al-SHIELDS Kids Unisex PM2.5 Filters
The PM2.5 name comes from these filters’ original use as protection against Particulate Matter 2.5, the smallest and most dangerous form of air pollution. Lab tests show a PM2.5 filter with a properly fitted cloth mask can reduce airborne particulates by as much as 90%.
- Five-layer protection
Dimensions: 7.75 Inch x 5 Inch x 1.5 Inch