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The RU8500 is one of the only reusable half masks on the market with a speech diaphragm. This feature offers improved speech clarity – eliminating the need for workers to leave the workspace or doff the mask in order to communicate. Made from soft: flexible silicone: the RU8500 provides workers with a comfortable fit for hours of use while the dual sealing flange provides an excellent facepiece seal. The RU8500 also has the unique option of a diverter exhalation valve cover: which directs exhaled breath downward and is ideal for painting/coating/sealing.