Design and functionality: Special vertical folding design: High performance exhalation valve to reduce heat and provide comfort when working in heat and humidity conditions: head welded by ultrasounds: individually wrapped in a hygienic plastic bag: Adjustable nasal bridge to improve the adjustment and reduce the fogging of the glasses: foam filling around the nasal bridge for more comfort: Dolomite test of obstruction (d) optional, to provide a more comfortable breathing and a longer filtration time: Package Individual for vending machine: Exhibitor box that helps presentation for sale. Materials, size and range: pp. PU foam. Available colors: White. Rules: Inspection International BV. In 149 FFP3 (NR D).