CleanSpace protective unit cover is a disposable cover that protects CleanSpace respirators from dirt and splash eg water, paint and cement; the CleanSpace protective unit covera should be changed after each use; important: when selecting a CleanSpace filter please consult a health and safety specialist for advice on the appropriate respiratory equipment and filter use; compatible with all CleanSpace PAPR power units; easy and quickly fitted and removed from the power unit; sold in pack of 25 pcs