Wide range of applications Broad application: filters can prevent airborne particles, dust, seasonal allergies, smog, contamination, ash, garden pollen, etc. <br> and are most suitable in most cases. Just cut freely and put it on the your face. <br> The nonwoven filter can be cut freely to your preferred size and simply sandwiched between your face. <br> Uses: can be used as the filter materials, oil-absorbing materials, sanitary materials such as rags, filtering layers, etc. <br>