CleanSpace EX half masks are specifically designed to complete the CleanSpace EX PAPR system; the half masks clip quickly onto the power units and are easily unclipped for cleaning; the half masks are made of soft silicone that readily moulds to the face and does not cause allergic dermatitis; the CleanSpace EX half masks have been treated with an electrically conductive coating and have been approved for the use in intrinsically safe environments