Vogmask Dudes N95 Carbon Filter Valve Filtering Mask / SMALL (3 to 7 Years) World&#39;s premier dust, pollen, germ and air pollution filtering mask features superior award winning filter material Carbon layer helps filter gaseous particles, exhaust, smells, and chemical components of air pollution. Small Size for 3-7 yrs Meets NIOSH N99 and N95 standards for filtering efficiency and Fit Testing Factor of 139 Exhale valve facilitates easy breathing and cooler temperature while wearing mask. Perfect for biking and sports. Reusable mask more eco-friendly than disposable and stores easily in pocket without damage