Triple structure filter with excellent blocking power:

1st SB Filter: By using a high-density filter, it has excellent blocking power and is safe from various kinds of dust and harmful particles.

2nd MB Filter: Maximizes efficiency by using high-efficiency mb filter produced in Korea.

3rd SB Filter: By using a skin hypoallergenic lining (dermatest, vegan certified), skin irritation is minimized, and the surface is smooth, so there is no fluff even when used for a long time.

Size: 116mm x 146mm.
Certificate: US FDA registered.
Material: polypropylene.