Preformed, particle-filtrating half mask for an effective protection against respirable dust as well as solid and fluid particles at dust laden works in all three EN-protection classes FFP1, FFP2 and FFP3. Odour-models are equipped with an additional active carbon layer, against annoying smells. Preformed, particle-filtrating half mask for an effective protection against respirable dust as well as solid and fluid particles at dust laden works in all three EN-protection classes FFP1, FFP2 and FFP3. Odour-models are equipped with an additional active carbon layer, against annoying smells.