1. Material: ABS
2. Slide the button to open or close the vents
3. Magnetic switch design, not easy to wear, easy to open and close
4. Switchable vent + mirror to solve odor and easy to wear
5. Water corrugated non-slip silicone pad helps reduce braces wear
6. Lightweight and ultra-thin, feel comfortable
7. Easy to wash and keep clean
8. Weight: 66.8 grams
9. Dimensions: 88x88x26mm