OX-ON Mask FFP3NR D w/Valve Supreme is the safety approved filtrating single-use mask with valve, which you can use when working with hazardous dry particles and liquid aerosols with a Workplace Exposure Limit (WEL)<5 mg/m3 (max. concentration 50 x WEL). You can with advantage use this disposable mask when working with aerosols with medium to severe toxicity as well as working with particles and aerosols from e.g. cement, lime, fertilizers, asbestos, caustic soda, welding fumes and bacteria, fungal spores, viruses, etc. The extremely comfortable mask is dolomite tested, which means that you get a piece of protective equipment with a particularly large dust capacity with slowly increasing resistance. At the same time, this quality mask is provided with a valve, which ensures you great comfort and a pleasant climate in the mask when you use it. The valve helps to prevent the accumulation of moisture and heat when wearing it. The sealing soft foam rubber at the nose as well as the mouldable aluminium nose bridge ensure you a perfect and comfortable adaptation to your face. The elastic band of the mask is latex-free. You get 5 pcs. masks per box.