The ergonomic design and comfortable breathing valve make the mask suitable for prolonged use in demanding working conditions. 3M FFP2 Dust Mask. This makes it ideal for prolonged work, especially in hot or humid conditions.
The sturdy elastic and nice adjustable nose clip
Allows the mask to fit even my beaky nose even
Under a welding mask. Also they seem very effective against ozone andl welding fumes including grinding dusts all of which I am very sensitive too.