Updated: 08-01-2026.
Anti-Pollution PM2.5 Rechargeable Breathable Half Cover Face Guard for Open-air Activities
Banggood warehouse: China.
Discount price $34.10 with coupon: AFfbG10
Additional Banggood coupons:
1. First page
2. Second page
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Purely Filter Mask Black. The lowest price was: $9.99.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).