NEOMask controls fumes, gases and particulates. Excellent for personal protection against Vapors, Smoke, Dusts, Mists and Fumes around the Home or Workplace. Made from hypo-allergenic high quality neoprene, resiliently stretchable & reusable. The NEOMask forms easily to varying facial features providing excellent seal and an unmatched fit. Machine wash, simply detach the carbon filter and place the neoprene into the washing machine then air dry. The inside material is an activated carbon cloth filter (ACC). ACC was originally developed in the UK by the British Chemical Defense Establishment as a highly efficient filter medium for protection against nerve gas and other highly toxic vapors that might be used in chemical warfare. ISO 9001, EN 46001, and ISO 13485? Once a contaminant enters the carbon, it diffuses into the carbon matrix where it enters smaller pores and the adsorptive forces begin to take effect. Once the contaminant reaches a higher-energy area it no longer migrates or diffuses because the adsorptive force is stronger than the diffusional force. The contaminant is adsorbed into the carbon surface by the adsorptive forces. Activated carbon respirator masks are principally used to remove low-levels (ppm or ppb) of organic species from entering the lungs. Excellent for personal protection against: Organic Vapors, Smoke, Dust, Mists, Fumes. Ideal for use around the home or the workspace. The ACC Carbon Activated Cloth typically lasts about 6 months under normal conditions. 4-6 weeks under harsh, polluted or dusty conditions. Simply change the ACC filter if you smell fumes when wearing the NeoMask or when air flow through the mask makes breathing more difficult.