JSP Press To Check™ FFP3 Dust Filters FFP3 particulate Press-to-check filters with hinge design to facilitate instant and accurate checking of the face fit, without effecting the seal of the mask to the face. Allow air to flow across the full area of the filter material, increasing efficiency and extending life. Large open area allows for lower breathing resistance and improved comfort. Features a built-in inhalation valve making the respirator easier to maintain. Low profile cover protects the enclosed pleated filter from moisture and foreign objects that could damage the pleats. Easily attaches to the Force 8 Respirator (available in 3 sizes see codes small = 494681000, medium = 454184000, Large = 652062000) ) with a secure fit when applied.