NOTE: Not compatible with O2 Nano Mask. Specifically designed for use with standard cloth/fabric masks.
Upgrade your own face mask with O2 Nano Mask's filter technology. Coming in a pack of five, each filter helps provide unwavering protection from PM2.5 particles thanks to a three-layer nanofiltration membrane, smaller than many viruses, including influenza.
- Includes 5 filters
- Each filter should last up to 60 hours or total wearing time
- Fully recyclable
4 3/4 x 3 1/4 inches
Opened filter packs are not refundable.