1. Food Grade PVC moulded cup type shell with changeable filter facility. Fitted with electrically charged non-oven fabric as filter in very high filtering efficiency for particles of 0.3~12 micron (Respirable size) .
2. Extremely light weight.
3. Foam pad to soften the pressure on nose.
4. Does not impair of Breathing, Voice and Vision.
5. One sixe fits to all shapes of faces.
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