e CleanSpace CST A1 P3 P SL R Combined Filter is suitable for protection against airborne particulates (dust, mists, and fumes), organic gases, or vapors; IMPORTANT: The filters are compatible with the latest model CleanSpace ULTRA and CleanSpace PRO PAPR Power Units; when selecting a CleanSpace Filter, please consult a Health and Safety specialist for advice on the appropriate respiratory equipment and filter use; used with the revolutionary CleanSpace ULTRA and PRO PAPR: lightweight, no hoses or belts; suitable for protection against airborne particulates (dust, mists, and fumes), organic gases, or vapors; materials: Fiberglass particulate media and plastic casing, silicone seal; easily and quickly fitted and removed from the power unit.