Particle masks classical, FFP3, from 3M, EN 149,2001, exhalation valveParticle masks classical, FFP3, from 3M, EN 149,2001, exhalation valve, and all round lip seal Acc. to EN 149: 2001 + A1: 2009. For protection against fine dust and liquid particles Shape retaining mask body with flexible nose bridge Soft padded fleece lining for wear comfort Secure tight fit even without foam insert Cool Flow exhalation valve reduces breathing resistance and prevents build up of heat under the mask Technical Information Exhalation