Every year, pollution kills around 2 million people in India alone, according to a study published in the peer-reviewed journal BMJ. Now with several parts of northern India and neighbouring Pakistan reporting record-breaking Air Quality Index (AQI), the focus has shifted to prevention. Health experts across the border have advised people to stay indoors, use air purifiers and wear anti-pollution masks. While the N95 is most commonly available, there are other anti-pollution masks as well. Why Do We Need Anti-Pollution Masks?We need anti-pollution masks to safeguard ourselves from harmful pollutants, particularly PM2.5 particulate matter, which is shown to directly enter the bloodstream and cause various diseases. Different types of masks protect the body, including surgical or cloth masks, N95 masks, N99 masks, N100 masks, P95 masks, and R95 masks.According to experts, one should always look for a mask with an intact seal and an expiratory valve to breathe out carbon dioxide, especially if one is exerting. They also underscore that wearing a reusable mask with re-insertable filters is better than wearing a disposable mask. It is pertinent to note that masks used for patients with asthma, bronchitis, COPD and other breathing issues must have a silicon lining for extra comfort. What Is An N95 Mask?N95 is the most recommended mask to protect against pollution and situations like COVID-19 pandemic. The 'N' is a Respiratory Rating Letter Class, which stands for "non-oil" meaning it does not provide filtration for oil-based particles in the air. Meanwhile, the 95 represents the percentage of protection it gives. So, an N95 mask is capable of filtering at least 95% of particles that are 0.3 microns in size or larger.Other Types Of Face MasksN99 and N100 Masks: These provide even higher levels of filtration, with N99 filtering out 99% of airborne particles and N100 filtering up to 99.97%. They’re more efficient than N95 masks for very polluted areas but are less breathable, which can make them uncomfortable for prolonged use.Like N95 masks, they are not effective against oil-based pollutants​.P95 and R95 Masks: P95 masks are resistant to oil-based particles, making them ideal for environments with both non-oil and oil-based pollutants, such as industrial settings.R95 masks also offer oil resistance but are designed for shorter-term use. These are often less common for daily wear and are typically used in specific occupational settings​.Surgical and Cloth Masks: These offer basic protection but are generally ineffective for fine particulate matter like PM2.5. They do not fit tightly, so pollutants can enter through gaps, reducing their effectiveness against air pollution.Cloth masks can be useful for dust and larger particles but are not recommended for highly polluted areas​.Activated Carbon Masks: High-end masks sometimes incorporate activated carbon filters, which help to absorb gases, odours, and certain toxins in the air.