The CleanSpace CST Half Masks are specifically designed to complete the latest model CleanSpace ULTRA and CleanSpacePRO 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. Used with the revolutionary CleanSpace PAPR: light weight, no hoses or belts Half masks available in 3 sizes to facilitate a good seal and a comfortable fit Materials: Soft silicone cushion, nylon clips and polycarbonate (exhalation valve) Mask Fit Test adaptor available for TSI PortaCount fit testing Easy removal for cleaning Transparent and facilitates communication