https://www.oxiclear.com/blogs/air-journal/n99-vs-n95-what-the-numbers-actually-mean 2026-08-23T21:28:13+05:30 weekly https://cdn.shopify.com/s/files/1/0019/4173/3429/articles/air-journal-india-gate-smog.jpg?v=1787500693 N99 vs N95: What the Numbers Actually Mean India Gate in New Delhi reduced to a silhouette by thick winter smog over Kartavya Path https://www.oxiclear.com/blogs/air-journal/how-to-read-aqi-and-when-to-mask-up 2026-08-23T19:48:07+05:30 weekly https://cdn.shopify.com/s/files/1/0019/4173/3429/articles/air-journal-aqi-city-comparison.jpg?v=1787494687 How to Read AQI (and When to Mask Up) The same city skyline split in two: clear blue air on the left, grey smog on the right https://www.oxiclear.com/blogs/air-journal/when-to-replace-your-n99-mask-filter 2026-08-26T11:29:33+05:30 weekly https://cdn.shopify.com/s/files/1/0019/4173/3429/articles/air-journal-filter-rule-delhi-street-smog.jpg?v=1787723973 When to Replace Your Mask Filter (and Why You Never Wash It) Auto-rickshaws and cycle rickshaws on Chelmsford Road, New Delhi, in thick smog on 31 December 2017, visibility down to a few car lengths https://www.oxiclear.com/blogs/air-journal/valve-or-no-valve-n99-mask 2026-08-26T12:03:15+05:30 weekly https://cdn.shopify.com/s/files/1/0019/4173/3429/articles/air-journal-valve-new-delhi-entry-smog.jpg?v=1787725995 Valve or No Valve: How to Choose Your N99 Mask The New Delhi Railway station entry gantry reading NEW DELHI barely visible through thick smog on 31 December 2017, with cars, an auto-rickshaw and pedestrians in the haze https://www.oxiclear.com/blogs/air-journal/why-your-glasses-fog-over-a-mask 2026-08-26T13:00:37+05:30 weekly https://cdn.shopify.com/s/files/1/0019/4173/3429/articles/air-journal-fog-glasses-over-mask.jpg?v=1787729436 Why Your Glasses Fog Over a Mask (and the Fix That Lasts) A woman outdoors in cool weather wearing a black fabric face mask, her spectacle lenses completely fogged over