CleanSpace CST A2 P3 P SL R combined filter is suitable for protection against airborne particulate (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 particulate (dust, mists, and fumes, organic gases, or vapors); materials: fiberglass particulate media and plastic casing, silicone seal; easy and quickly fitted and removed from the power unit.