1、Made of high quality nylon mesh fabric,soft,comfortable and flexible. 2、Replaceable active carbon filter inside removes over most dust, fumes, pollen, haze, chemicals etc. 3、Mesh farbic and double air breathing valves for small air resistance and smoother breathing. 4、Ergonomic design to cover your nose and mouth,providing you great conservation. 5、Adjustable headband with fastener tape,ear loops and nose clip for stable and safe wearing. 6、Suitable for running, Cycle, camping, traveling, climbing, outdoor activities and daily use. The Breathing Valve Mask with Active Carbon Filter features on its unique ventilation.Multiple holes and double air breathing valve for small air resistance and smoother breathing.Suitable for running, Cycle, camping, traveling, climbing, outdoor activities and daily use. Features: Made of high quality nylon mesh fabric,soft,comfortable and flexible. Replaceable active carbon filter inside removes over most dust, fumes, pollen, haze, chemicals etc. Mesh farbic and double air breathing valve for small air resistance and smoother breathing. Ergonomic design to cover your nose and mouth,providing you great conservation. Adjustable headband with fastener tape,ear loops and nose clip for stable and safe wearing. Suitable for running, Cycle, camping, traveling, climbing, outdoor activities and daily use. Specification: Material: nylon mesh fabric,plastic,active carbon Size: 33*16cm/13.0*6.3in Weight: Approx. 40.6g/1.4oz (include an active carbon filter) Package size: 16*14*2cm/6.3*5.5*0.8in Package weight: Approx. 51.2g/1.8oz Package List: 1* Mask 2* Valve 1* Active Carbon Filter 1* Instruction 1* Mask 2* Valve 1* Active Carbon Filter 1* Instruction