Half Face Shield Filter Activate Carbon Anti Dust Fog Mouth Cover face Masks available 100%New Imported Price 2.5BD For inquiry contact through WhatsApp Features: Cycling Protective Mask With activated carbon filter To keep dust out Anti-dust, Anti-haze Ergonomics Design make you feel comfortable Velcro fastening design Replaceable filters and exhalation valves to keep the inside of the mask well ventilated How to Use: 1. Put the mask between the nose and chin. 2. Fixed the back of the dust mask with the strap. 3. Cover your face with your hands, then breath hard and feel if there is air flow. If not, then it is not appropriate. 4. Ensure that you are comfortable when you have wore this mask by adjusting the back of the strap. 5.you can try to tighten the breathing valve الحالة جديد