Washable & Reusable TOOVREN 3D Mask Enhancer
How to use mask insert plastic
- Firstly, put your mask on a flat surface, inside facing up, place breathing cup for under mask on your mask.
- Next, pull ear loops through slits on the sides of the breathing cup for under mask.
- Finally, pick up the mask and wear it as normal. You may have to do some slight adjustments