- Wide Features: The filter features four layers purifying inner cover, 3D silicone seal and one time stamping forming.
- Portable and Wearable: The filter with soft and skin-friendly outer cover is portable and wearable.
- Double Fixation: The strong dustproof cloth is used as the bandage and the double fixation mode of ear wear.
- Adjustable Filter: The filter can shrink freely according to the face shape, so you can adjust ear to wear comfortable degree to fix more firm.