1. Poor Air Quality: Cambridge Mask is most useful in urban environments with poor air quality. It filters out 99% PM 0.3 and PM 2.5 particles.
2. Travel: Cambridge Mask provides effective protection from vehicle exhaust, dust, or pollution, making it a necessary travel companion.
3. Health: Cambridge mask respirator is treated with silver, offering protection from 99% bacteria and viruses, leading to a lesser chance of infection & better health.
4. Allergies: Pollen & other allergen particles measure from 3 microns to 100 microns. Wearing Cambridge Mask protects your lungs from inhalation of 99% of these allergens.

Usage: Can be used for 3 months with 2 hours usage daily

1. Open/unfold the mask.
2. Twist the valve cap to the left to remove.
3. Adjust the length of the loops to best fit the head.
4. Place the loops around your head and adjust the nose clip.
5. If you have bought the micro fan, attach on the valve and switch it on.

• Before putting on a mask, clean hands with alcohol-based hand rub or soap and water.
• Ensure that the mask is covering your nose, mouth and chin properly and elastic bands are positioned carefully behind the ears.
• Also, ensure that the metallic strap of the mask is resting properly against the bridge of your nose.
• Once you have worn the mask properly, breathe in and out to check for air-leaks. Ensure that the air is only coming through the valve (filter) in the mask.
  
• Avoid touching the mask while using it; if you do, clean your hands with alcohol-based hand rub or soap and water.
• Replace the mask as suggested in the usage based on the filter,
• To remove the mask: remove it from behind (do not touch the front of the mask); clean hands with alcohol-based hand rub or soap and water.

• What is PM 2.5 and AQI: Particulate Matter (PM) is classified based on the size of the particle. Particle sizes of 2.5 microns and below are referred to as PM 2.5. These particles can penetrate into the gas exchange region of the lungs and are considered hazardous. The concentration of PM 2.5 particles is commonly referred to as the Air Quality Index (AQI) number. The higher the AQI, the higher the concentration of these hazardous particles.
• Is Cambridge mask washable & reusable?: Cambridge mask is washable & reusable. For best results, use for up to 3 months (assuming 2 hours of usage daily).
• Does it need a fan or filter replacement?: Cambridge mask filters do not need to be replaced. Cambridge masks have a breathing valve & do not require a fan.