1. How can I use the Face Covering right?

- Please carefully read the instruction. The Face Covering is washable and reusable

2. Why is it not made of cotton

 - The polyester is needed to resist droplet. The inner layer is very cool, comfy and sweat absorbent

3. Can I adjust the metal piece for the nose?

- Yes

4. Are the ear loops elastic and stretchable?
- Yes