1. 4-ply filter element filter mask insert is composed of SS non-woven, negative ion non-woven and melt-blown non-woven, with the functions of anti-haze, anti-smog, anti-dust, anti-gas, anti-bacterial, anti-odor, etc.
2. 3D three-dimensional cut, fit the face design, more comprehensive protection.
3. Environmentally friendly and skin-friendly lining fabric, non-allergenic, moisture-wicking.
4. Fine overlock finish keeps fabric in place, prevents dust from entering, more secure to wear.
5. How to use: Insert the mask filter along the inside opening of the mask and use it (recommended for daily replacement).