DLP Tactical Hostile Environment Cycling / Running / Training Carbon Filtration Neoprene Face Mask (Black) Reusable, replaceable dual carbon filtration elements filter out exhaust fumes, CO2, methane, and 99.9% of particulate dust Special exhaust valves quickly vent your exhaled breath, keeping the incoming air cool and fresh Half mask style quickly goes on and off and secures tightly with velcro, reinforced aluminum nose bridge prevents slipping Thermal regulating Neoprene mask is comfortable and provides protection against scrapes and flying debris Perfect for cycling, running, urban hiking, roadside work, tactical & duty wear, paintball & airsoft sports, or anywhere dust or noxious conditions are expected to be encountered