The 3M Particulate Respirator 8833 is a robust respirator that fits well to most face shapes and sizes and maintains its shape well during use. 3M Cool Flow Valve reduces heat build up Comfortable protection, particularly in hot and humid conditions Soft inner face-seal ring provides secure face fit and increases wearer comfort Robust and collapse resistant, cup-shaped design, nose clip to maintain secure fit 3M Cool Flow exhalation valve for comfort in hot or humid environments Approved to: EN 149:2001 FFP3; Nominal protection factor 50; Assigned protection factor 20