Designed and crafted to provide the highest levels of air purification Four-layer activated carbon filtration system technology Antibacterial & antiviral with particle matter filter (PM 2.5-0.3) filter protection Offers protection from pollution, fine dust, harmful gasses and allergen Soft cushioned nose strip for comfort Inner adjustable noseband for a contoured face fit Adjustable/removable head strap Can be approximately used for between 3 to 12 months Reusable mask can be wiped down with a soapy warm cloth