3M 8833 Cup-Shaped Respirator (Valved) - FFP3 (Sold in Packs of 5) Provides respiratory protection against higher levels of fine dusts, mists, and metal fume. Additional Information, Robust shell and cup design conforms well to most face shapes and sizes and maintains its shape well during use. 3M Cool Flow valve reduces heat build up to offer comfortable protection, particularly in hot and humid conditions. Soft inner face-seal ring provides secure face fit and increases wearer comfort. Reliable, effective protection against fine particulates. Excellent fit over a wide range of face sizes provided by convex shape, nose clip and twin-strap design. - Comfortable, light weight off-the-face design. Red colour coded straps denoting FFP3 protection level. Standard: EN149:2001 FFP3 Approval: CE Marked Maximum use level: Assigned Protection Factor: 20 x WEL (Nominal Protection Factor 50 x WEL).