Issue 005 · care
Why Your Glasses Fog Over a Mask (and the Fix That Lasts)
Fog is breath escaping near your nose: a fit signal you can see. The nose pin fix, the over-the-edge trick, and one tip from the surgeons.
The Air Journal
OxiClear's magazine on air, breathing and the craft of masks.
5 issues in the library · Updated 26 August 2026
OxiClear N99 Anti-Pollution Mask with Valve – DRDO Lab Tested
The mask these pages keep coming back to. One mask, four filters and a headband in the box.
N99
DRDO Lab Tested
Made in India
₹999 Same-day dispatch
Add to BagFilters renew on one rule: 21 days or 100 hours of use, whichever comes first.
The library
004 fit
Valve or No Valve: How to Choose Your N99 Mask
Two masks, one difference: a disc that opens when you breathe out. What it does, why some settings say no, and how to choose.
003 care
When to Replace Your Mask Filter (and Why You Never Wash It)
A reusable mask has exactly one consumable part. The rule for swapping it, the signs it is due early, and why the filter never goes in the wash.
002 air-quality
How to Read AQI (and When to Mask Up)
The Air Quality Index in plain language: the bands, the daily swings, and a practical answer to the question everyone asks. When should I mask up?
001 masks
N99 vs N95: What the Numbers Actually Mean
The letters on a mask are claims. What the ratings mean, what certification really tells you, and what OxiClear proves in a defence laboratory instead.
Renew
Fresh filters keep the pages honest
One filter size fits the whole current range. Replace every 21 days or 100 hours of use, whichever comes first.
Renew filters
