Here are some tips on how to use N95 masks effectively:

1. Choose the right size: Select a mask that fits snugly over your nose and mouth.

2. Wear it correctly: Place the mask over your nose and mouth, with the colored side out and the white side in.

3. Secure it: Adjust the nose clip and straps for a tight seal.

4. Check the seal: Perform a user seal check by inhaling and exhaling to ensure air doesn't leak around the edges.

5. Wear it consistently: Wear the mask consistently when in public or in high-risk areas.

6. Replace it: Replace the mask every 8-12 hours or sooner if it becomes wet, soiled, or damaged.

7. Dispose properly: Dispose of used masks in a sealed bag or container.

8. Avoid touching: Avoid touching the mask while wearing it to prevent contamination.

9. Clean your hands: Wash your hands before and after putting on and taking off the mask.

10. Follow guidelines: Follow local guidelines and regulations for wearing N95 masks.