The Life Masque Personal Protection Mask is unlike any other mask on the market today. It is lighter, more breathable, more liveable, longer lasting, most especially, more protective. No more feeling like you're sufficating or struggling with steamed eyeglasses and chaffing behind the ears. You will forget you are wearing it at all... Unlike other masks that rely on heavy layers of fabric and materials such as carbon. Life Masque relys soley upon a spaceage inner filter which prevents even the smallest of nanoparticle-- other than air --to pass through. Life Masque removes over 99% of impurities-- and yet is as light as as a feather. The Polyimide Aerogel filter over 99% of airborne particles (GB19083-2010 certification) and over 99% BFE (Bacterial Filtration Efficiency) (YY/T0969-2013 certification.) Additionally, the Polyimide Aerogel filter require no de-gassing prior to use to remove odor. Please note: these masks are not suitable for children under 3 years old. Smaller sizes are still in development.