KASA MASK FILTER FOR ANTI-DUST AIR POLLUTION ACTIVATED CARBON SPORT MASK 

• Recommend To Replace The Filter Every 30 Days In Normal Circumstances And Replace The Filter Before Going Out During Special Times.
• Double Air Breathing Valve
• Something Breathing And Reducing Heat Build-Up
• Five Layer Filtered Activated Carbon
• Filter Out 99% of Dust, Pollen, Non-Oil Based Particles, Size 0.1 Micron Or Greater
• 1- Activated Charcoal Layer
• 2- Wicking Internal Scrim Layer
• 3- Sub-Micron Particulate Filter Layer
• Face Cover Filter Activated Carbon Replaceable
• (1) Anti Spray / Anti Haze / Anti Saliva / Anti Dust
• (2)5-Layer Filtration, Safety Protection, Rest Assured Breathing
• (3)Filtering Effect > 95%