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30 days return guaranteeFFP3 respirators with valve to reduce the exposure to diseases transmitted by micro-aerosols. 98% minimum filtration of suspended particles with the size ≥ 0.3 μm. A good fit of the mask to the facial contours is essential to ensure a proper seal, which is essential for the proper functioning of the mask. The valve helps to reduce the moisture and heat inside the mask, which provides the user with greater comfort and also gives them the feeling of reduced breathing resistance.